J-PARC Annual Report 2011
Contents
Preface……………………………………………………………………………………………………………

1

Accelerators………………………………………………………………………………………………………

3

Overview……………………………………………………………………………………………………… 4
LINAC………………………………………………………………………………………………………… 6
RCS…………………………………………………………………………………………………………… 7
MR…………………………………………………………………………………………………………… 9Materials and Life Science Experimental Facility………………………………………………………………… 13
Overview of the damage caused by the earthquake in March 2011……………………………………… 14
Neutron Source…………………………………………………………………………………………… 16
Neutron Science…………………………………………………………………………………………… 17
Muon Science……………………………………………………………………………………………… 20
Neutron Device…………………………………………………………………………………………… 23
Particle and Nuclear Physics……………………………………………………………………………………… 25
Hadron Experimental Facility……………………………………………………………………………… 26
Neutrino Experimental Facility……………………………………………………………………………… 30
Cryogenics Section ……………………………………………………………………………………………… 33
Overview…………………………………………………………………………………………………… 34
Superconducting Magnet System for the T2K Beamline…………………………………………………… 34
Superconducting Kaon Spectrometer (SKS)………………………………………………………………… 34
Construction of the Superconducting Magnet System at MLF…………………………………………… 35
Cryogen Supply and Technical Support…………………………………………………………………… 35
R&D for the Future J-PARC Project: COMET………………………………………………………………… 35
R&D for the Future J-PARC Project: New g-2 and HFS……………………………………………………… 36
Study on Strain Behavior of Superconductors……………………………………………………………… 36
Information System……………………………………………………………………………………………… 37
Overview…………………………………………………………………………………………………… 38
Statistics of Network Utilization …………………………………………………………………………… 38
Statistics of Computer Resource Utilization………………………………………………………………… 39
Transmutation Studies…………………………………………………………………………………………… 41
Activities…………………………………………………………………………………………………… 42
Safety …………………………………………………………………………………………………………… 45
General Safety ……………………………………………………………………………………………… 46
Radiation Safety…………………………………………………………………………………………… 46
Users Office ……………………………………………………………………………………………………… 49
User Program……………………………………………………………………………………………………… 53

Organization and Committees…………………………………………………………………………………… 59
Organization Structure …………………………………………………………………………………… 60
Members of the Committees Organized for J-PARC………………………………………………………… 61
Main Parameters ………………………………………………………………………………………………… 65
Events ……………………………………………………………………………………………………………… 67
Events……………………………………………………………………………………………………… 68
Dates for Committees……………………………………………………………………………………… 74
Publications……………………………………………………………………………………………………… 75
Publications in Periodical Journals ………………………………………………………………………… 76
Conference Reports and Books…………………………………………………………………………… 83
JAEA Reports ……………………………………………………………………………………………… 90
KEK Reports ………………………………………………………………………………………………… 90

J-PARC Annual Report 2011

Preface1

Preface
Although the timing of this Annual Report is extremely late and thecontents may be outdated, I feel nevertheless that it would be very usefuland important to publish this 2011 Report, in order to keep it as a recordof the J-PARC activities.
In 2011 the major event at the J-PARC facility was the recovery fromthe damage caused by the March earthquake. At the time when thisearthquake occurred, I thought that it will be almost impossible to resume
operations within a year. Roads were winding like wet candies; manyelectric power supplies and water supplies torn down; accelerator magnets and shielding concretes plus irons moved significantly; and someadjunct facility buildings inclined. In addition, water and electricity were
not available for the first few weeks.
Nevertheless, by carefully examining all the damages, we created aschedule of recovery to the original shape within 9 months, to be completed by the end of the year. Our people worked very hard, day andnight, and finally by December 9th of 2011 all the elements were recovered back and the J-PARC was able to restart data acquisition with users
from the beginning of 2012.

Preface

J-PARC Annual Report 20112

I felt strongly that this recovery work could be accomplished becauseof the true and nice collaboration among all J-PARC members and their
hard work. Although late, making this record public would show genuine
appreciation not only for the funding agencies, the two parent institutions(KEK and JAEA) and all others who helped us, but also for our teammembers working at J-PARC.
Since the restart, the J-PARC operations increased in intensity andprovided beams for users in a rather smooth way in 2012. The use of
these beams allowed extensive data collection, which made that periodof our work really successful.

Shoji Nagamiya(Director in 2011)

Linac3 GeV RCS

50 GeV MR

Accelerators

Accelerators

J-PARC Annual Report 20114

Overview
In the fiscal year of 2010, the proton beam power had been successfully
ramped up to 200 kW, 145 kW, and 3.5
kW at 3 GeV, 30 GeV fast extraction(FX) and 30 GeV slow extraction (SX),
respectively. J-PARC, however, wasseverely damaged by the earthquake
on March 11th and the beam was shut
down. The recovery work proceeded
and thanks to the great efforts of staff
members and the help of the support
personnel, the accelerator restarted
beam commissioning in December
2011.
The accelerator status as of fiscal
year (FY) 2011, which also includes partof FY 2010 and 2012 is summarized in
Figure 1. The main topics related to thebeam operation are as follows,(1) The restoration work was accomplished on schedule and the linac
beam tuning started on December
9th, 2011. The linac beam was injected into the RCS on the 17th, followed by the 3 GeV beam injection
to the MLF and the MR on the 22nd.
The MR delivered the beam to theneutrino beam line on the 24th.
(2) We had delivered beam to users forabout 2 months in FY 2011.
(3) User run of RCS for MLF was started at 100 kW, and the power wasincreased to 200 kW. We demonstrated 275 kW delivery for about 3days, which was a preparatory operation for further power up.
(4) We demonstrated 300 kW and 420
kW (equivalent beam) for MLF andbeam loss data were comparedwith those before the earthquake.
(5) User run of MR-FX was started at 80
kW, and the power was increased
to 160 and then again to 200 kW.
(6) We demonstrated 212 kW for MRFX.
(7) User run of MR-SX was started at 3.3
kW, and the power was increased
to 6 kW. The extraction efficiency of
99.5% has been maintained for the
Hadron users.
(8) We demonstrated 14 kW (equivalent beam) extraction for MR-SX.
The operation statistics and thetrip time by system in FY 2011 areshown in Figure 2 and 3, respectively.
The total operation time was 2,455
hours (including startup and conditioning) and the scheduled user timewas 1,210 hours. The beam availability,
however, was reduced to 73% due tothe trouble of a klystron power supplyof linac in March. The trip hours due tosome linac components such as a Ra-

dio Frequency Quadrupole linac (RFQ)and Separated-type Drift Tube Linacs(SDTLs) are dominant. The causes are
suspected to be vacuum related issues
in these cavities. The number of trips isdecreasing for the RFQ as the vacuum
condition is getting better. And several vacuum improvement tasks at the
SDTL cavities will be carried out during
the summer shutdown of 2012.
The user operation is planned totake about 180 days in FY 2012 (April
2012 to March 2013). The operation
time before the summer shut down (asof July 2nd ) is 2,104 hours and the user
time for the MLF, NU and HD are 1,646,
1,058 and 376 hours, respectively. We
had no serious troubles and the beam
availability has got back to 94% for
MLF, 90% for NU, and 94% for HD.
The steady progress toward 1 MW
of RCS and 0.75 MW of MR as well as
the restoration work and operation has
continued. The linac energy upgrade
was postponed to 2013 and about sixmonth long-shutdown was scheduled.
The R&D and construction for power
upgrade components such as an ion
source, an RFQ, accelerating cavities,
power supply systems, collimator systems, etc. are proceeding.

Figure 1.1. Run summary op FY 2011
FY 2010Month
Operation(Run#)

1

FY 2011

2

3

#37

#38

4

5

6

7

8

9

10

FY 2012
11

12
#39

1

2
#40

300kWeq.
MLF (3 GeV)
200kW
MR-Slow Ext.
(30 GeV)
MR-Fast Ext.
(30 GeV)

3
#41

5
#42

5-10kWeq.

80kWeq.

275kW
14kWeq.
3.56kW212kWeq.
80-120kW

160-200kW

eq. :Equivalent beam power (Single shot or short period demonstration)

Fig. 1.1. Run summary of FY 2011.

7

#43

210kW

3.3kW

145kW

6

420kWeq.
120kW

Recovery work fromthe earthquake4

J-PARC Annual Report 2011

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5

Fig. 1.2. Operation statistics in FY 2011. The total operation time is 2,455 hours.

Fig. 1.3. Beam trip by system in FY 2011.

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J-PARC Annual Report 2011

6

LINAC
The linac facility was extensively
damaged by the huge earthquake inMarch 2011. The damage to the buildings on the ground was particularly
severe. Due to the damage, most of theutilities became unavailable for months.
The RF cavities and magnets themselves were not damaged seriously inthe earthquake, vacuum leaks however
occurred in ion source, MEBT1 and SDTL
sections by destruction of vacuum port,
beam monitors and bellows. We hadmany cracks in the accelerator tunnel,
and groundwater leaked into the tunnel. The RF cavities were exposed tohighly humid air for several weeks.
We performed realignment work
for almost all accelerator components
because the displacement of the components occurred due to the building’s
deformation. The realignment was
carried out in line with a plan whichemphasizes swift recovery of beam
operation tolerating the deflection of
the beam line at the exit of DTL.
Ignitrons in the klystron power
supply did not turn on when triggered.
That probably occurred because the igniter became wet through chopped liquid mercury stored at the cathode dueto the strong quake. After the mercury
was removed, the normal functions of
the most of the ignitrons were restored.

After significant recovery efforts,
we resumed the beam operation in December 2011 and the user operation in
January 2012. The beam power fromthe linac reached 13.3 kW in March
2012, which was the same power asjust before the earthquake. While weadopted deflections in the alignment
axis in the realignment, so far we haveobserved no obvious effect on the
beam quality.
The SDTL5 showed unstable behavior just before the operation restarted. It was impossible to input thedesign RF power into the cavity. In order to avoid the unstable behavior, we
adopted 109% of the design amplitudein January 2012. However, the unstableregion widened during the operationand forced us to increase the operating
amplitude to 116% in March 2012. We
think that the unstable behavior wascaused by multipactor on the surfaceof the cavity wall at SDTL5B. We plan
to investigate the cause precisely andtake some measures during the summer maintenance period in 2012.
After resuming the user operation,
we experienced beam losses whichwere not observed before the earthquake. Especially, we had severe beamlosses and resultant high residual radiation dose in the beginning of theFig. 2.1. Bellows distortion due to the earthquake.

beam start up. By realignment of somebeam ducts and optimization of the
RF setting for SDTL cavities, we succeeded in reducing the beam loss to alevel comparable to the one before theearthquake. We plan to continue theeffort to mitigate further the beam loss
in parallel with achieving higher beam
power for the user operation.
On March 22, 2012, the linac operation stopped because of a problem
with the klystron power supply. Its
cause was a diode module breakdown
in the high voltage transformation
unit. Finally, we replaced the transformation unit and restarted the user
operation on April 8. Because the user
operation was stopped for more than
two weeks by this problem, the operation schedule in the FY 2012 was modified to reduce this influence.
The ion source is supplying thebeam without serious aftereffects fromthe earthquake. The results of recent
beam runs show that the ion sourceis capable of continuous operation for
approximately 1,200 hours with beam
current of 17 mA. For another attempt
to enhance the ion source availability, we tried to decrease the required
time for routine maintenance. By
shortening the duration of ion source
vacuuming from 20 to 5 hours, theFig. 2.2. Test stand of RF-driven negative ion source.

J-PARC Annual Report 2011

Accelerators

7
maintenance was completed within 24
hours without any beam performancedegradation of the ion source.
A linac power upgrade program is
now in progress. We started a full-scale
development of a cesium seeded RFdriven negative hydrogen ion source.

The ion source extracted a beam of
more than 60 mA with a duty factor of
2.5%, which satisfies the requirementsof the program. A new RFQ for 50 mA
acceleration is under construction on
the basis of a RFQ fabrication process,which is being built as a backup for thepresent RFQ. The mass production of
the Annular-ring Coupled Structure
linac (ACS) modules and the installation of 972 MHz RF sources systemhave been almost completed. All ACS
modules will be installed in the tunnel
in the summer of 2013.

tion device that suffered little damage,a low power inspection of the vacuum
pumping system, the diagnostics system, etc. was completed.
During the restoration of the outdoor yard and the high-voltage electric boards, a complete power outage
was necessary from mid-June until theend of August, as shown in Fig. 1. Oncethe electric power was started again in
September, the restoration of the cooling water system was limited and adetailed check of the high-power components commenced.
It was also concluded that no serious damage occurred to the equipment/instrumentation in the RCS
tunnel. The position and rotation errors
for all the equipment/instrumentation
based on magnets, including the RF
cavities and the beam position monitors, were precisely measured using alaser tracker. The data are summarizedin Table 1. The alignment errors indicate the difference from the reference
position. Position errors for the horizontal and vertical planes cause closed
orbit distortion, and thus reduce thephysical aperture for the beam. To reduce this effect, it is necessary to correct the closed orbit distortion using
steering magnets. The position errors
for the longitudinal plane cause phaseadvance distortion and the rotation
errors for the transverse plane enhance the linear coupling resonance.
Because it was found by simulationthat the closed orbit distortion could

be corrected with correction magnets,
and the effects of the longitudinal
misalignment and rotation error were
small, it was decided that the realignment would be performed during the2013 summer shutdown period [1].
The beam commissioning of the
RCS resumed on December 17th 2011.
It was found that almost no beamlosses were registered from injection
through extraction in the case of the
300 kW equivalent beam extracted forthe beam dump located in the beamtransport line from the RCS to the neutron production target. In addition, thebeam loss at the beam transport linefrom the RCS to the MR was nearly thesame as it was before the earthquake
in the case of the 300 kW equivalentbeam. From these experimental data,
which were consistent with the beamsimulation results, it was concluded
that the realignment of the RCS components was not necessary in the caseof the 300 kW beam operation. Thus,
the 300 kW beam was prepared fordelivery to the MLF, and the users resumed the operations in January 2012.
Therefore, both the 120 kW beam
power for the MLF and the 300 kW
equivalent beam for the MR were backonline on schedule. The beam power
for the MLF was increased to 200 kW in
mid-March and the user operation has
been performed with high stability.
The beam power for the user operation of the MLF could be increased to
275 kW from the 29th of June 2012.

RCS
The accelerator components of
the RCS are installed in the main tunnel
on the second basement floor; there
is also a sub-tunnel where the power
supply cables and cooling water pipes
are installed. Many high-power devices, such as chilling refrigerators, cooling towers, capacitors, transformers,
rectifiers, power distribution boards,
and so on, are located in an outdoor
yard, which surrounds the building.
After the earthquake in March 2011,
the yard subsided from 30 cm to 1 m inmany places, so the high-voltage distribution boards were greatly inclined,
and the transmission busbars weredamaged. Therefore, the power outage
had to be maintained until the repairs
to the equipment were completed. The
accelerator components in the yard
also suffered serious damages. Manybases for the capacitors and transformers necessary for the resonant power
supply and rectifiers for the RF cavities were inclined. In addition, hollow
spaces emerged at many points underthe bases of these devices. The cabletrays installed along the building andall four cooling towers for the water
system were damaged. An investigation of the specific damage to the accelerator components was conductedin two steps during the power outage.
First, a visual inspection of the components in the tunnel was carried out using a diesel generator to produce thenecessary light. Then, with access toelectricity from a single-power genera-

Accelerators

J-PARC Annual Report 20118
Figure 2 shows the beam loss
monitor signal in the entire RCS before and after the earthquake for the
300 kW and 420 kW-equivalent beams.
The re-alignment of the RCS components was not necessary for the 300
kW beam operation. For the 420 kWequivalent beam, however, the beamloss after the earthquake was 2 times
larger than before the earthquake. The
total particle loss after the earthquake
was 0.8%. The re-alignment, which isscheduled for the 2013 shutdown period, is required for the MLF user operation at beam powers higher than
420 kW.
While the repair work was being
completed, this opportunity was used
to complete some upgrades to the system to realize a 400 MeV injection anda beam power of 1 MW [2]. Specifically,
the downstream beam losses due tothe charge exchange foil were localized by installing a new collimator at
the injection area. A residual activationlevel of >5 mSv/h was observed for thisarea in the case of 220 kW for the beam
operating for 2 weeks. The residual activation was measured on the chamber
surface 4 hours after the user operation was completed. This loss, which is
proportional to the number of foil hits,
is one of the biggest issues that must
be addressed if a higher beam power
for the RCS is to be realized. Based onbeam studies and simulations, it was
concluded that large angle events with
Coulomb scattering create a hot spot
downstream of the foil. Therefore, thenumber of foil hits should be reduced
by using a transverse painting injection and optimizing the foil size. These
treatments for the beam loss havealready been implemented, but it is

impossible to reduce this loss to zero.
Since the loss leads to a high residual
activation, a new collimator system
was installed downstream of the foil tolocalize the uncontrolled beam losses.
As a result, the residual activation ofthis area was reduced by one order ofmagnitude creating the possibility of ahigher beam power for the RCS.
Improvements have also been carried out for the 400MeV injection andbeam loss reduction. To achieve a 400
MeV injection, a total of five power
supplies, one for the injection bumpmagnet and four for the paint bumpmagnet, must be improved. A new
power supply for the paint bump magnet has been successfully installed andis available for the user operation [3].
The other four power supplies are under construction.

Table 3.1. Position and rotation alignment errors measured with a laser tracker after the earthquake.

Item

Alignment Error

Position (horizontal)
Position (vertical)
Position (longitudinal)
Rotation (transverse)−4 – +6 mm−3 – +1 mm−3 – +3 mm−0.4 – +0.2 mradFig. 3.1. Restoration work at the RCS facility. Left: Re-paved road. Right: Straightened capacitors and transformers on re-leveled bases.

J-PARC Annual Report 2011

Accelerators

9

Fig. 3.2. Beam loss distribution of the RCS in the case of the 300 kW and 420 kW-equivalent beams. The blue line shows thebeam loss distribution before the earthquake and the red line - after the earthquake.

References[1]	N. Tani et al., IPAC12 WEPPP085(2012).
[2]	N. Hayashi et al., IPAC12 THPPP081(2012).

[3]	T. Takayanagi et al., IPAC12 THPPD051 (2012).

MR
In the MR tunnel, many cracks
were found, with groundwater leaking from many of them just after theearthquake. The groundwater poured
onto the magnets and vacuum ductsof the MR (Fig. 4.1). Urethane and highmolecular compound were used to fillin the cracks to stop the water leaks.
Figure 4.2 shows an expansion
joint located in a sub-tunnel, whichconnects to Escape Building #2 (E2).
The sub-tunnel to E2 subsided, and alevel difference of about 50 mm appeared in the expansion joint. The rubber joint absorbed the level distortion.
There are 43 expansion joints in theentire J-PARC facility. Among them, 7
expansion joints have level differences larger than 50 mm after the earthquake. Repair or reinforcement of the
expansion joints is planned for the2012 shutdown period or later.
The vacuum pressure in the MR
measured on March 25 was 230 Pa, 3
orders worse than the normal pressure build-up after switching off thepump system for 2 weeks. Leak testing performed on April 1 detected a
vacuum leak larger than 10−4 Pa m3 s−1
at the flanges between the fast extraction septa. The vacuum pressure datalogged in the archive system showedthat the leak occurred just after theearthquake. Fortunately, there were nolarge vacuum leaks in the other partsof the MR and no seriously damaged
vacuum ducts.
Figure 4.3 shows the magnet positions measured in April and May
2011 using a laser tracker system. The
maximum displacements after theearthquake were larger than ±15 mmhorizontally and 10 mm peak-to-peakvertically. From the end of August to
the beginning of December 2011, we
re-aligned all the magnets and most of
the monitors in the ring.
During the 9-month shutdown
period, we also made various improvements in the operational stability andbeam intensity of the MR as follows:(1) Installation of additional shields forthe ring collimators:
Loss power capacity of the MR collimator section will be increased from 0.45
kW to 2 kW by installing additionalshields and absorbers during the 2011
shutdown, and an additional set of collimators during the 2012 shutdown.
Figure 4.4 shows the iron shield walls
installed on both sides of the MR collimator in the autumn of 2011. They aremounted on a linear motion guide rail

Accelerators

J-PARC Annual Report 201110
for easy maintenance.
(2) Replacement of the injection kicker
system:The traveling-wave-type injection kickers used until March 2011 had problems of discharging in the vacuum
chamber and high beam-coupling impedance. Figure 4.5 shows the newly
installed kicker magnets. The new kicker has a simple lumped-constant-type
structure, a well-shaping pulse form,
and lower beam-coupling impedance.
(3) Installation of the 7th and 8th RF
systems:
We added 2 RF systems to obtain accelerating voltages larger than 200 kV
for higher beam intensity operation.
Beams can also be operated as a second-harmonic system by changing theresonance frequency to manipulate thelongitudinal bunch form and reduce
the effect of the space-charge force.
(4) Modification of the RF cooling water system:
A new cooling water system for the RF
cavities was installed in order to separate it from the cooling water system
for the magnets.
(5) Installation of a collimator in the SX
straight section:
The new collimator system was installed
to reduce the residual radioactivity on
a quadrupole magnet located downstream from the electrostatic septum(ESS). Figure 4.6 shows the SX collimator installed in the SX straight section.
The collimator has movable tungsten
alloy jaws to cut the beam halo in thehorizontal and vertical directions.
(6) Installation of skew quadrupoles
and octupoles:
Four skew quadrupoles were installed
to correct the linear coupling resonance and three octupoles to suppress
the instability.
The user operation of the MR started in January 2012. The MR was operated in the SX mode and delivered thebeam to the hadron experimental hallfrom January 28 to February 21 andfrom June 9 to July 2. The cycle time of
the SX operation is 6 s. After 1.9 s acceleration, the circulating beam is slowly
extracted for ~2 s. The delivered beam
power was 3 – 6 kW and the extraction
efficiency of the SX is ~99.5% during theuser operation. As reported in the last
annual report, the most serious issue
to be solved in the SX operation was a
spike-like time structure in the extracted beam. The structure is brought byfluctuation of the betatron tune whichis caused by current ripples of ΔI/I ≈10−4 for the main magnet power supplies. The duty factor, an index to evaluate the quality of the time structure of
the extracted beam, was ~17% in theautumn of 2010 run. After the recovery
from the earthquake, we switched ona transverse RF system, which feeds an
RF field with a narrow band around thefrequency of the betatron oscillation
to a strip-line kicker. This increases theamplitude of the oscillation and pushes
the beam to the third-order resonancefor extraction. In order to suppress thevacuum pressure rise due to the multipactoring effect in the strip-line kicker,
12 sets of solenoid coils were installedon the beam duct of the strip-line kicker
during the shutdown period. The duty
factor during user operation after February 2012 was improved from 17% to
30% using the transverse RF system.
Figure 4.7 and 4.8 show the time dependence of the extraction efficiency
and the duty factor during the 6-kW
user operation, respectively. The spill
length is also plotted in Fig. 4.8. The efficiency, duty factor, and spill length arestably kept during the operation.
Before the 2012 summer shutdown,
the maximum extracted intensity of
1.7×1013 ppp (particle per pulse) was
demonstrated. It corresponds to thebeam power of 14 kW. The extraction
efficiency and duty factor were 99.5%
and 33.7%, respectively. After the 2012
shutdown, a user operation with beam

power larger than 10 kW will be started.
The MR was operated in the FX
mode and delivered the beam to theT2K experiment from March 5 to June
9, 2012, including 2-week shutdown
due to the trouble on the klystronpower supply of the linac. Before theearthquake, the accelerating time from
3 GeV to 30 GeV was ~1.9 s, and theshortest total cycle time was 3.04 s. The
2 RF systems added during the 2011
shutdown period made it possible toachieve faster accelerating times as
short as 1.4 s. The total cycle times were
set to 2.92 s in the operation in Marchand 2.56 s in the operation from April
to June, 2012. For stable operation witha large proton number per pulse, thebunch-by-bunch feedback system wasadopted to suppress coherent oscillation of betatron sideband in the routine
user operation. The system is necessary
for a user operation with beam intensity larger than ~5×1013 ppp. In addition,
since June a multi-harmonic RF feedforward system for beam-loading compensation has been switched on in theroutine operation. The maximum delivered beam intensity for the T2K experiment was 200 kW (~1.1×1014 ppp) after
the recovery from the earthquake. The
MR surpassed its own world record of
extracted number of particles per pulse
in synchrotrons.
Figure 4.9 shows the history of delivered number of protons beam to theT2K experiment until the 2012 summer shutdown. The T2K experimenthas started collecting physics datafrom January 2010. The total numberof delivered 3.1×1020 protons on target(POT) is three times larger than that of
the K2K experiment, the former generation long-baseline neutrino oscillation
experiment, which delivered the beamby the 12-GeV KEK-PS for four years. By
using the data, the T2K group observed
eleven candidate events of electron
neutrino appearance.

J-PARC Annual Report 2011

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Fig. 4.1. Groundwater leaking in the MR tunnel.

Fig. 4.2. Expansion joint in the sub-tunnel tobuilding E2.

Fig. 4.3. Measured displacements of MR magnets after the earthquake in the horizontal (R), vertical (Z) and longitudinal (S) directions. Ins-A, B, and C are
straight sections for “beam injection”, “slow extraction”, and “RF and fast
extraction”, respectively.

Fig. 4.4. Newly installed iron shields in the MR collimator section.

Fig. 4.5. N ewly developed lumped-constant-type injection kickers.

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J-PARC Annual Report 201112

Fig. 4.6. New collimator system installed in the SX straightsection.

Extraction efficiency [%]

100
99.8
99.6
99.4

100 min.
99.2
99.0

479

480

Shot # (x103)

50

2.5

40

2

30

1.5

20

1

100 min.

0.5

10
0

Spill length [%]Duty factor [%]Fig. 4.7. Time dependence of the extraction efficiency during the6-kW user operation.

0
479

480

Shot # (x103)

Fig. 4.8. Time dependence of the duty factor and spill length during the 6-kW user operation.

Fig. 4.9. History of the number of protons delivered to the T2K experiment.

Materials and Life Science
Experimental Facility

Materials and Life Science Experimental Facility

J-PARC Annual Report 201114

Overview of the damage caused by the earthquake in March 2011
The main building of the Materials and Life Science Experimental Facility (MLF) withstood the very large
earthquake, which occurred in March
2011. The damage to the componentsof the building was relatively limited and most of them looked sound.
However, a vacuum break occurred in
the aluminum neutron beam ducts of
the neutron beam shutter blocks. The
mercury target trolley installed at thedownstream of the proton beamline,
which weighs about 300 tons, wasmoved back by the strong vibration,
thereby stretching the bellows seal
system of the target, designed toprevent a helium gas leakage.
On the other hand, many outsidefacilities, such as the plumbing system,

the liquid nitrogen storage tanks, anda helium tank, surrounding the MLF
building, suffered severe damage due
to ground subsidence .
The damage in the tunnel of the
proton beam transport line affected
mostly the downstream part connected to the MLF building. It appearedthat the tunnel had subsided unevenly
and tilted slightly toward the ocean.
The damages on three extensions
to the MLF building for long beamlines
were serious. The subsidence of thewest extension for BL18 (SENJU), BL19
(TAKUMI) and BL20 (iMATERIA) reached
up to 14 cm. The east 50 m extension
for BL08 (S-HRPD) sank down 9 cm andmoved 3 cm toward the north. The
new east extension for BL09 also sankdown and tilted 1/400. Because of thesubsidence of the extensions, the supermirror guide tubes and shielding
were partly broken at the boundaries
between the buildings.
The Muon Science Facility (MUSE)
in the MLF also suffered damage fromthe earthquake. It was found that somewater pipes and cables of an air circulation system for the proton beam tunnel were damaged around the muontarget since the wall was about to fall
down. An air-sealing hatch preventing
the flow of activated air between the
primary proton beam tunnel (M2 tunnel) and the MUSE area had also been
seriously damaged.

Resuming the user operation
The recovery works from the major damage by the earthquake were
almost completed by the end of November 2011 as scheduled, and an
injection of a 3 GeV proton beam tothe neutron target was resumed on
December 22, 2011.
From January 24, 2012, neutron
beams were supplied to most of theneutron instruments that were operated before the earthquake (BL01,
BL03, BL04, BL05, BL10, BL11, BL12,
BL14, BL15, BL16, BL20 and BL21). Two
instruments, BL19 and BL08, in theextension buildings should wait toresume their operations until March 1
and 23, respectively, due to the severe
damage to the buildings. The permission to operate the new instruments(BL02, BL09, BL17, BL18) was given after instrument inspection on January
26 and February 1.
The muon target received a proton
beam and introduced a muon beam to
the MUSE area on January 24.
Experiments of the 36 neutron proposals out of 166 approved proposals(115 general-use, 44 project-use and 7

instrument group use) for the 2011A
period were carried out at overseas
neutron facilities (SNS, LANSCE, ISIS,ILL and HANARO), and two proposals
were completed at SPring-8. Seven
muon experiments out of 16 proposals (14 general-use and 2 project-use)
were carried out at RAL by courtesy of
RIKEN. In the 2011B period, 19 neutron
proposals out of 56 approved generaluse proposals and 5 muon proposals
out of 7 approved general-use proposals were carried out after the user program resumed.

Table 1. Beam statistics for the MLF user program in Japan fiscal year 2011.

No. ofrun cycle

Nominal beam
power (kw)#39

Duration

Scheduled time(*)(h)

Only for target study0

Availability
(%)

#40

120

11pm on 01/14/2012 – 07am on 02/22/2012

549

95.8%

#41

120

11pm on 03/5/2012 – 12pm on 03/31/2012

547

58.9%

(*) Note: The scheduled time excludes the duration allocated for the purpose of the beam study for the 3-GeV proton beam transport line and/or
the mercury target in MLF.

J-PARC Annual Report 2011Materials and Life Science Experimental Facility

15

BL-08: S-HRPD
BL-09: SPICA

BL-05: NOP

BL-10: NOBORU

BL-04: ANNRI

BL-11: PLANET

BL-03: iBIX

BL-12: HRC

BL-02: DNA
BL-01: 4SEASONS

Proton beam line

D1 Instrument
D2 Instrument
BL-21: NOVA

BL-14: AMATERAS
BL-15: TAIKAN

BL-20: iMATERIA

BL-16: SOFIA

BL-19: TAKUMI

BL-17: SHARAKU

BL-18: SENJU

Neutron Instruments
BL
BL01
BL02
BL03
BL04
BL05
BL06
BL08
BL09
BL10
BL11
BL12
BL14
BL15
BL16
BL17
BL18
BL19
BL20
BL21

Name of Instruments
Moderator
Status4SEASONS: 4D Space Access Neutron Spectrometer
Coupledin useDNA: Biomolecular Dynamics Spectrometer
Coupledcommissioning
iBIX: IBARAKI Biological Crystal Diffractometer
Coupledin useANNRI: Accurate Neutron-Nucleus Reaction measurement Instrument
Coupledin use
NOP: Neutron Optics and Fundamental Physics
Coupledcommissioning
VIN ROSE: VIllage of Neutron ResOnance Spin Echo spectrometers
Coupledplanning
S-HRPD: Super High Resolution Powder Diffractometer
Poisonedin useSPICA: Special Environment Neutron Powder Diffractometer
Poisoned under construction
NOBORU: NeutrOn Beam-line for Observation & Research Use
Decoupledin usePLANET: High Pressure Neutron Diffractometer
Decoupled
commissioning
HRC: High Resolution Chopper Spectrometer
Decoupledin useAMATERAS: Cold-Neutron Disk-Chopper Spectrometer
Coupledin useTAIKAN: Smaller-Angle Neutron Scattering Instrument
Coupledcommissioning
SOFIA: Soft Interface Analyzer
Coupledin useSHARAKU: Polarized Neutron Reflectometer with Vertical Sample Geometry Coupledcommissioning
SENJU: Single Crystal Neutron Diffractometer under Extreme Condition
Poisoned under construction
TAKUMI: Engineering Materials Diffractometer
Poisonedin useiMATERIA: IBARAKI Materials Design Diffractometer
Poisonedin use
NOVA: High Intensity Total Diffractometer
Decoupledin useMuon Instruments
BL
D1
D2

Name of Instruments
D1 Instrument
D2 Instrument

Fig. 1. Status of the neutron and muon instruments at the MLF as of March, 2012.

Statusin usein useMaterials and Life Science Experimental Facility

J-PARC Annual Report 201116

Neutron Source
Recovery works

Neutron intensity (n/Tp/lethargy)

The first mercury target damaged by the earthquake
was replaced with a new target in November 2011. Figure 2 shows the first target with elongated bellows seal.
The new target vessel is equipped with a bubbler for
mitigating the pitting damage caused by the pressure
waves in mercury. This was our first time to replace a target vessel, i.e. a heavy and large radioactive component
by a remote-handling system since the beam operation
was started at the MLF. The replacement was successfullycompleted in 7 days just in the same way as the handlingtest under the cold condition. Unfortunately, the installation of the helium gas supply system, which supplies
compressed helium gas to the bubbler, could not becompleted in time for resuming the beam operation due
to a trouble in a helium compressor. However, the mercury circulation operation of the target system started
again in December 2011 without using the bubbler.
On December 22, the first proton beam after theearthquake was successfully delivered to the mercury
target. On December 23, a neutron beam was introduced
for the first time to the NOBORU instrument (BL10) undera 1 Hz operation. A neutron beam profile was measured
with an image plate (Fig. 3). The neutron flux intensity
was measured with the gold foil activation method anda neutron energy spectrum was measured with a He-3
monitor counter (Fig. 4). These measurements showthat the earthquake did not seriously affect the neutron
beam characteristics.

1x10

5

8x10

4

6x10

4

4x10

4

2x10

4

0
-3
10

Fig. 2. The first target with elongated seal bellows.

Fig. 3.	Neutron beam profile measured with image plate. The
displayed character means "recovery" in Japanese.

After the earthquake(measured in 2011/12)

Before the earthquake(measured in 2011/02)

-2

-1

10
10
Neutron energy (eV)100Fig. 4. Measured neutron flux spectra before and after the earthquake.

J-PARC Annual Report 2011Materials and Life Science Experimental Facility

17

Investigation of the pitting damage in the first target
Before the target vessel replacement, disk specimens
with 50 mm in diameter were cut out in order to assess
the effects of collisions by strong pulsed-proton beams
and investigate the pitting damage on the beam windowof the target vessel. Based on observations with a camera,some pitting damage was documented at the center andthe both sides of the window. Many pitting damages werealso scattered over the specimens. Furthermore, throughobservation of the replicated surface of the specimen bya laser microscope we estimated that the localized pit was
about 120 µm deep. We concluded that the homogeneouserosion of the surface of the specimen reached a depth of
250 µm. The accumulated beam power on this target vessel was 475 MWh since the start of the first beam injectionin May 2008.

Fig. 5. The disk specimen cut from the target vessel.

Neutron Science
Repair of the pre-shielding blocks for the neutron beamlines
The pre-shielding, which was installed in the upperstream of each neutron beamline (7-12 m from the centerof the neutron target/moderators), was displaced by theearthquake. Because the pre-shielding was composed ofpiling shielding blocks with a tunnel structure of 1 m inwidth and 2 m in height, the upper blocks nearly fell down
(See. Fig.6). Fortunately, no blocks hit the beamline components, which were installed in the tunnel structure, but
most of them were in unstable positions.
At the beginning of the repairs, we installed steel supports to prevent secondary accidents and maintain thesafety of workers and components. Then, we removed allshielding blocks, and re-piled them with inserting special
spacers and/or additional plates. The total numbers of repiled side shielding and top blocks were 280 and 248 respectively, and the total weight was 2,772 tons.
The repairs of the pre-shielding were implemented byorganizing day and night working shifts, and so the work
was completed in approximately three months by midSeptember, 2011.

Fig. 6. Upper block in a critical state.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201118

Recovery works of the extension building for BL08 and BL09
The extension building for BL08 and BL09, which
was attached to the east side of the MLF building, sank
8.8 cm at an expansion joint and 2.77 cm at a sample
position as a consequence from the earthquake, because it was built without concrete piles. Consequently,
some iron shielding blocks of the beamlines collapsed
and a few guide tubes near the joint part between twobuildings were destroyed. In addition, the sample position was displaced 1.25 cm to the north and 3.39 cm
to the east (See. Fig.7). Since curved guide tubes were
equipped in the extension building for BL08, the adjustment work of the sample position and the guide tubes
was not straightforward. To resolve the problem, we improved the guide tube support mechanism for BL08 sothat it allowed us to adjust the guide tube positions by
as much as 10 cm along vertical and horizontal directions. The iron shielding blocks were also raised several
centimeters instead of repairing the subsidence anddisplacement of the building itself.
All the temporary restoration was completed by
the end of March 2012 and the operation permission
was granted on March 23 by the J-PARC radiation protection supervisor.

Fig. 7. The displacement and subsidence of two extension buildings.

Scientific topics
A New Solid Electrolyte Li10GeP2S12 for Li-Ion Batteries (N. Kamaya, et al.)From the viewpoint of improving the safety of thelithium-ion batteries, the non-flammable solid electrolytes have the promising potential to replace the currently used liquid organic electrolytes. Although theadvantages of solid electrolytes are widely acknowledged, their low ionic conductivities prevent themfrom being used in practical applications. Recently a
new lithium superionic conductor Li10GeP2S12 exhibiting an extremely high lithium ion conductivity of 1.2 ×
10-2 Ω-1cm-1 was discovered.
The structure analysis was carried out using thehigh-resolution neutron powder diffractometer S-HRPD(BL08). The structure was found to be tetragonal (spacegroup P42/nmc) with lattice parameters of a = b = 8.7177
Å and c = 12.6345 Å. Lithium ions at the 16h and 8f sites inFig. 8. ( a) Crystal structure of Li10GeP2S10. (b) Framework structure
LiS4 tetrahedra are considered to participate in ionic conof (Ge0.5P0.5)S4 tetrahedra, LiS6 octahedra and PS4 tetrahedra.
duction and form the 1D conduction pathways. These(c) 1D conduction pathways of lithium ions along the c axis.
16h and 8f sites were found to be occupied by 69 and 64 %The zigzag conduction pathways are indicated.
of Li, respectively. The result indicates partial distributionof lithium ions on the conduction pathway, which is acommon characteristic of the superionic conductors.

J-PARC Annual Report 2011Materials and Life Science Experimental Facility

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Pulsed neutrons light up the hydrogen-bond network and the pH sensitivity in human transthyretin (T. Yokoyama, et al.)Transthyretin (TTR) is a tetrameric human plasma protein
composed of identical 127-residue subunits, each with a β-sheet
structure. TTR plays a major role in the transport of thyroxine andretinol, the latter via the TTR-retinol binding protein complex.
TTR composes the amyloid fibrils found in patients afflicted witheither familial amyloidotic polyneuropathy (FAP) or senile systemic amyloidosis (SSA). It has been found that in vitro an acidic
medium promotes TTR fibrillogenesis, and that the extent of amyloid fibril formation is enhanced for amyloidogenic mutant TTR.
In order to investigate the structural explanation for the pHdependent effects and structural stability of TTR, time-of-flightneutron protein crystallography was performed using iBIX (BL03).
Experimental results clearly showed that H88 is single protonated, which suggest that the full protonation of H88 by the acidic
pH probably breaks this hydrogen-bond network and destabilizes both the tetramer and the dimer. The structural destabilization
caused by the lowered pH can be accounted for by the full protonation of H88. This is the first crucial piece of information on theFig. 9.	The |Fo|-|Fc| difference neutron scattering length
way to elucidate the atomic details of the amyloid fibril formation.
density map calculated omitting H88 and water
The neutron crystal structure including hydrogen atoms
molecules. The dashed yellow lines indicate thehydrogen bonds.
could be useful for in-silico drug screening in terms of calculation of the accurate binding free energy. The present study demonstrates that the neutron protein crystallography is a powerful
method for studying hydrogen bonds and pH sensitivities inproteins.

Magnetic Excitation Spectra of Superconducting Ca10Pt4As8(Fe1-xPtxAs)10 (x~0.20) (M. Sato et al.)The multiband nature of Fe-based superconductors is a significant characteristic that differentiates them from high-Tc Cuoxides. Keeping that in mind, we have been working to find out
whether the superconductivity in Fe pnictides displays a newpairing mechanism related to this multiband nature or to theorbital degrees of freedom. A number of papers have suggested that the magnetic mechanism similar to that of Cu-oxides is
primarily important for the occurrence of the superconductivityof Fe-based systems (S+- symmetry). On the other hand, if theorbital fluctuation mechanism, which may arise from the orbital
degrees of freedom is important, we do not expect the sign reversal (S++ symmetry).
To investigate which symmetry, S+- or S++, is realized, inelastic neutron scattering measurements on Fe-based superconductor Ca10Pt4As8(Fe1-xPtxAs)10 (x~0.20) were performed at 4SEASONS(BL01). The energy width of the peak of the χ’’ (QM, ΔE) curve isFig. 10.	Intensity map of the magnetic scattering in the
a*-b* plane of Ca10Pt4As8(Fe1-xPtxAs)10 (x~0.20).
much larger even at T<<Tc than the resolution width. If the symmetry is S+-, the peak should be sharp. The experimental results are
consistent with the nonexistence of the pair breaking effects bynonmagnetic impurities and seem to support the S++ symmetry.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201120

Muon Science
Damage from the earthquake and recovery work
There was damage in some helium
ducts, control cables, power cables,
compressed air piping for a superconducting solenoid magnet andan on-line refrigerator system for Dline, due to ground subsidence up to
1.5 m outside the MLF building. A buffer tank for the He gas was also tilted
by 2-3 degrees. In accordance with thehigh-pressure gas regulation, we had
to replace all the helium ducts at theboundary. After the replacement, in
December 2011, we eventually stabilized the operation of the superconducting solenoid magnet using theon-line refrigerator.
The M1 and M2 air circulation systems for a proton beam tunnel aroundthe muon target were severely damaged. It appeared that the water ducts
and control cables around an expansion
joint between the MLF building and a

proton beam transport line from 3-GeV
RCS (3NBT) had to be removed and rebuilt. The repairs were completed in November 2011.
The components located in theM2 tunnel are a target chamber, six
quadrupole magnets, four steering
magnets, two sets of profile monitor assemblies, 29 sets of pillow-seal
assemblies, and seven sets of duct
assemblies. When the electric supply resumed after the earthquake, itturned out that the vacuum in a primary beam duct of the M2 line wasbroken and reached air-pressure level.
We suspected a problem in the pillowseals. After we did vacuum leak checkfor all pillow-seals, it appeared that thepillow-seals themselves were not damaged, but the tightness of a metal gate
valve caused the leak.
An edge-cooled non-rotating

Fig. 11.	Damaged helium ducts for the on-line refrigerator at the boundary of the MLF building.

graphite target has been adopted, theso called ‘fixed target’, because of theease in handling during maintenance.
In order to investigate the soundnessof the graphite target assembly, anychanges not only in the dimension but
also in the heat conductivity were inspected by a remote handling system
in a hot cell. Consequently, it turned
out the assembly was sound and wewould be able to use it continuously
for at least another year.
Many anchor bolts (M24) were split
off from the concrete shielding blocks
due to the strong quake and several
concrete shielding blocks themselves
were broken or cracked. All the damaged blocks were temporarily repairedby a concrete manufacturer before November 2011.

Fig. 12.	The damaged wall was about to fall down at the
expansion joint between 3NBT and MLF, as water
ducts for the M1 and M2 air circulation systems
were supporting the wall.

Muon Beam Commissioning
The D-line recovered from almost
all earthquake damage and its operation was resumed at the end of December 2011. It is our great pleasure

to report that we could deliver surface
and decay muons of up to 60 MeV/c,
which is the same intensity as that before the 2011 earthquake, towards theD1 and D2 lines. The user operation
was restarted from February 2, 2012.

J-PARC Annual Report 2011Materials and Life Science Experimental Facility

21

Measurement of deformation and thermal diffusivity of Graphite Target
We suspected a serious deformation of amuon target rod, and then the exact position of
the muon target rod was measured in a Hot cellin August and September of 2011. Simultaneously, the irradiation effect of 3-GeV proton to thermal diffusivity of the graphite was investigated,because it is known that the crystal structure ofgraphite material is broken and the thermal diffusivity decreases by proton beam irradiation. Figure
13 shows the results of the position measurement.
The difference in position between the used target
and the un-irradiated target was less than 0.5 mm.
In conclusion, the deformation of the muon target
rods was relatively small; they can be used again.
The thermal diffusivity along a vertical line
and a horizontal line going through the center ofthe muon target were measured every 1 mm. Furthermore, the thermal diffusivity of an area withdimensions of 20 mm horizontally by 16 mm vertically was measured every 2 mm (Fig. 14). It turned
out that the diffusivity distributed in an ellipseshaped area similar to the beam profile.

Fig. 13.	The result of the measurement for the positions of used target
and spare target against the position of the mock target.

Fig. 14.	The distribution of the thermal diffusivities on the area with dimensions of
20 mm horizontally by 16 mm vertically.

Materials and Life Science Experimental Facility

J-PARC Annual Report 2011

22

Status of Superomega Muon Beamline
The U-line in the second experimental hall of MLF is the second
muon beamline. The Superomega
muon beamline, which is a muon extraction and a transportation part of
the U-line, is now being installed on
the U-line. The characteristic featuresof the Superomega are a large solid
angle acceptance, simultaneous extraction of both positive and negative
muons, and the usage of solenoids forall beamline magnets. The first goal of
the Superomega is to supply surface
muons to the ultra-slow muon beam,
which is energy tunable low energy
muon beam for a variety of experiments, such as surface-interface magnetism and muon g-2 measurement.
The Superomega muon beamline
consists of three parts, such as a normal-conducting capture solenoid, asuperconducting curved transport so-lenoid, and an axial focusing solenoid.
At present, the capture solenoid has
already been installed in March 2009.
The fabrication of the curved transportsolenoid and the axial focusing solenoid was completed. Both of them will
be installed in the summer of 2012.
The axial focusing solenoid isinstalled on the downstream of thecurved transport solenoid. The axial focusing solenoid consists of five beamline vacuum chambers and six warm
bore cryostats. Each cryostat has two
thin solenoids, which can be individually applied to the current to transportand focus muon beam onto an experimental target. The axial focusing
solenoid is cooled down by thermal
conducting method using a 1.5-W Gifford-McMahon (GM) refrigerator.
To avoid radiation exposure in anexperimental area, the beam blocker

is inserted into the muon beamline
to stop muons and other similar particles. To eliminate almost all positrons,
which are simultaneously transportedwith the muons from the muon beam,electrodes of positron separators witha 30-cm gap, 75-cm length and 50-cm
width can be applied ±400 kV by using Cockroft-Walton type high voltage power supplies on the beamline
chamber. According to the simulation,
2 × 108 muons/s can be focused on toa final experimental target (70 × 50mm) placed on 700-mm downstreamof the last focusing solenoid. This indicates that the Superomega muon
beamline will be the highest intensity
pulsed muon source in the world. The
first beam extraction experiment ofSuperomega beamline will be carriedout in October 2012.

Fig. 15.	The vacuum chamber of the positron separator and the cryostatsof the superconducting coils of the axial focusing solenoid.

J-PARC Annual Report 2011Materials and Life Science Experimental Facility

23

Neutron Device
Multiwire-type two-dimensional neutron detector with individual readout and opticalsignal transmission system for SHARAKU (BL17)
Optical fiber

35 cm

A position-sensitive neutron detection system thatcan read out individual signal lines and consists of a
two-dimensional detector element has been developed
for the polarized neutron reflectometer “SHARAKU”.
The developed neutron detector system consists of a
256 channel multiwire detector element with a space of
1 mm equipped into a pressure vessel, amplifier-shaperdiscriminator (ASD) boards, optical signal transmission
devices, position encoders with field-programmablegate arrays (FPGAs), and a fast data acquisition device(Fig. 16). An optical signal transmission is a promising
candidate for use in the neutron scattering facilities atwhich many sample environments cause complicatedbackground noises, because the optical fiber has nosensitivity to electromagnetic forces. It was found that
our system can separate signal pulses with very fasttime interval of 1 ms by evaluating the time response of
our whole signal processing system.

35 cm
Fig. 16.	A developed two-dimensional He-3 neutron
detector system.

Development of an in-situ SEOP 3He neutron spin filter: Compact magnetocavity
An in-situ spin exchange opticalpumping (SEOP) 3He neutron spin filter has been developed for the neutron scattering experiments at J-PARC,
because it can polarize neutrons in awide energy range and is effective fora large divergent beam, etc. It is important to make the system compact andstable, because the system is locatedinside thick and bulky radiation shields

for high energy gamma rays and neutrons in neutron beam lines. We havedeveloped a compact magnetostatic
cavity (Fig.17 and Fig.18) with a double-layered permalloy shield and solenoid coils and a compact laser optics
system with a volume holographic
grating (VHG) element for the SEOP
system. The magnetic field strength at
the center position of the cavity is de-

Fig. 17.	A developed magnetostatic cavity. The outerdimensions of the cavity were 272 mm in diameter and 364 mm in length.

signed to be 2.339 mT and |∆B⊥/ B0| ≤5.34 cm-1. This corresponds to the 3He
relaxation time of ~200 hours. Moreover, the cavity can keep the magnetic
field homogeneity which leads to sufficiently long 3He relaxation time longer
than 100 hours under the existence ofan external field of 3.5 mT.

Fig. 18. A developed magnetostatic cavity.

Particle and Nuclear Physics

Particle and Nuclear Physics

J-PARC Annual Report 2011

26

Hadron Experimental Facility
Overview
The year 2011 was a year of recovery from the Great East Japan Earthquake. A significant portion of humanresources and time has put towards
early recovery of the facility damaged
the earthquake. However, the damage
was not serious. After the earthquake,all the components of the facility, suchas the magnets, beam monitors, andslits on the primary and secondary
beam lines as well as the experimental
detectors, were realigned. Due to thelimited time, three secondary beamlines—K1.8, K1.8BR and KL— was able
to be operated during the beam timeof RUN40 from January 28 to February
22. The 30-GeV proton beam was backto the Hadron Facility at 21:07:38 on
January 28. The beam from the Main

Ring (MR) was successfully transported
to the production target and the beam
dump without any adjustment of thebeam line parameters. Operation of
the secondary beam lines was carriedout from February 1 to 22 using a 3.3
kW beam.
In addition to the recovery, several
improvements were achieved in thefacility. A new indirectly water-cooled
platinum production-target and additional shielding blocks for the 50 kW
beam were installed. The government
inspection for the 50 kW operation was
performed successful.
In spite of the limited availability ofthe beam, there was a steady progressin present and future experimental
programs. The search for Θ+ penta-

quark baryon at K1.8 has reached asensitivity beyond previously achieved.
A successful engineering run has been
completed for experiments to study
Kaon-Nuclear bound states at K1.8BR.
Installation and commissioning of theapparatus for the KOTO experimentwere well in advance preparing forthe start of physics run in 2013. A highmomentum primary-proton beam line
is being designed for the experiment
to search for lepton flavor violation
with muons and the experiments on
hadron physics, such as studies of chiral property in nuclei. R&Ds have been
performed for the beamline and experimental apparatus.

Experiments on Nuclear/Hadron Physics
Search for Θ+ Penta-quark Baryon at
K1.8
The Θ+ is an exotic baryon with aquark content of uuddsbar. Since the firstreport from the LEPS experiment at
SPring-8, many positive and negative
results have been published; the existence of the Θ+ is controversial. J-PARC
E19 aims to search for Θ+ via the p(π−,K −)X reaction with a good missingmass resolution, better than 1.5 MeV/c2(FWHM), using a high-resolution beamand the SKS spectrometer.
The first physics run with the beam
momentum 1.92 GeV/c was carried out
at the K1.8 beam line in 2010. In total,
7.8×1010 π− was irradiated on a liquidhydrogen target of 0.86 g/cm2. No peakstructure corresponding to the Θ+ was
observed, as shown in Fig.1. The upper
limit (90% C.L.) of the forward angle
cross section was obtained as 0.26μb/sr
over the mass region from 1.51 to 1.55
GeV/c2. With the help of a theoreticalmodel based on the effective Lagrangian
and by introducing a Yukawa coupling

and hadron form factors, the upper
limit of the decay width of Θ+ wasestimated to be 0.72 and 3.1 MeV/c 2
for JP= 1/2+ and 1/2−, respectively.
The second run at the beam momentum 2.0 GeV/c was successfullycompleted in RUN40. In total, 8.7×1010
π− was irradiated with 1.7×106/spill intensity, owing to the improved extracted
beam and detector conditions. A higher
sensitivity than that of the first run is
expected.
Studies on Kaon-Nuclear boundstates at K1.8BR
J-PARC E15 aims to study kaon
nuclear bound states, K− pp, with bothmissing mass and invariant mass methods. K− pp is produced via the 3He(K−, n)reaction and detected through the K−
pp→Λp→π− pp decay chain using the
Cylindrical Detector System (CDS). The
E15 group carried out a commissioningof the beam and CDS using a liquid4He target at the K1.8BR beam line. The
CDS was confirmed to operate well; thereconstructed vertex points were distributed in the target cell. A Λ peak was
clearly reconstructed in the pπ− invariant mass spectrum. Fig.2 shows a typical event display for the Λp→π− pp final
state.
Study for High Momentum Beam Line
In addition to the current experiments, preparations for future upgrades in the Hadron Facility are
underway. Construction of a high momentum beam line is planned in thenext five years. A new experiment tostudy chiral properties in the nucleus isalso being planned.
The new beam line will be separated from the current primary beam line
at the middle of the switch yard, wherea very small fraction (~0.01 %) of the
primary beam will be bent. The designof the magnet for bending the halo
part of the beam is very important.
Therefore, the beam profile including
the halo part was carefully measured
over a wide range. Fig.3 shows the re-J-PARC Annual Report 2011

Particle and Nuclear Physics

27
sults of these measurements, exhibiting a clear beam profile over the threeorders of magnitude.

Fig. 1. Missing mass spectrum for the reaction p(π−,K−)X at the beam momentum
1.92GeV/c, obtained from the first run of E19. The red curve shows a simulated spectrum of the background processes.

Fig. 2. Typical event display for the Λp→π−pp final state measured using
the CDS at K1.8BR.

Fig. 3. Measured beam profile.

Experiments on Particle Physics
Search for rare Kaon decay
The quantum transition of a heavy
particle into lighter particles is called“decay” in particle physics. The decay of
a particle proceeds via several patterns
or “decay modes.” Once experimentally
determined, the branching fraction
for a decay mode is compared to thetheoretical predictions. A discrepancy(if any) between the experimental results and theoretical predictions is anevidence for new physics that goes beyond the Standard Model (SM).
The decay of a long-lived neutralkaon (KL) into a neutral pi meson (π0)
and pair of neutrinos—represented as
KL → π0νν—is known to be a “rare andprecious” decay mode in particle physics. The symmetry in the combinationof the discrete multiplicative operationsof charge conjugation (C) and of spatial
inversion of coordinates (P) – “CP symmetry” in short - is broken in this transition, and new sources of symmetry
breaking that can explain the matter–
antimatter asymmetry in the universe
may be revealed most clearly by examining this decay. In theoretical studies,
KL → π0νν is a very clean decay mode.
SM predicts its branching fraction to be
2.43 × 10−11; i.e., the decay occurs oncein every forty billion KL decays. Thus far,
the theoretical uncertainty of the fraction is 16%; however, it will be reduced
to several percent or less in the near
future based on the results of other experiments, e.g., Belle II. In contrast, forexperimentalists, this is a challenging

decay mode because only two photons
from π0 decay are observable. The moststringent upper limit to date was set by
the E391a experiment at the KEK 12 GeV
proton synchrotron at 2.6 × 10−8, whichis still a thousand times larger than the
SM prediction.
In 2006, the J-PARC E14 KOTO experiment was proposed to search forthe “one precious stone” in forty billion
KL decays; it is now under construction
at the Hadron Experimental Hall. The
beam power of the slow-extracted protons from the 30 GeV Main Ring would
be suitable for the rare decay search.
A new neutral beamline was built for
KOTO, and the beam was surveyed in2009.

Particle and Nuclear Physics

J-PARC Annual Report 201128
A new electromagnetic calorimeter with 50-cm-long undoped CsI
crystals—used previously in the KTeV
experiment at Fermilab, USA—wasconstructed in 2010. After the big earthquake in March 2011, the crystals andphototubes in the calorimeter were
examined and confirmed to be undamaged. The beamline components wererealigned (Fig. 1), and detector con-struction was resumed. In August and
September 2011, the calorimeter wastested in a vacuum (Fig. 2).
The J-PARC accelerators resumed
operation in 2012; using the slow-extracted beam in February 2012, an engineering run of the calorimeter was
conducted to establish the calibration
methods with the electrons from the KL→ πeν decay and the photons from the

KL → π0π0π0 decay. Also, in February, thevacuum vessel of E391a, which was tobe reused for the KOTO detector, wasmoved from Tsukuba to Tokai (Fig. 3).
The KOTO collaborators will continue detector construction in 2012. The
team plans to start the treasure hunt,i.e., the physics run, in 2013.

Fig. 2. KOTO personnel working on placing a cap on thecalorimeter for a vacuum test.

Fig. 1. Realignment of the beamline componentsof the KOTO experiment.

Fig. 3. E391a vacuum vessel that arrived at the Hadron Experimental Hall in Tokai (top) and was placed on the floor of thehall (bottom), where it will remain until detector construction starts.

J-PARC Annual Report 2011

Particle and Nuclear Physics

29

Search for Charged Lepton Flavor Violation with muons
The Standard Model of particle
physics strictly requires the conservation of lepton flavor in charged leptons.
Studies on the lepton flavor violation(LFV) process with muons probes new
physics beyond the Standard Model.
The Coherent Muon to Electron Transition (COMET) experiment at the J-PARC
was proposed to search for an LFVprocess, i.e., the μ-e conversion, witha sensitivity of 10 −16. There was no opportunity to use a beam at J-PARC in2011 because of the recovery efforts of
the accelerator; however, detector development and study of the superconducting magnet have helped to makesubstantial progress.
A prototype of the straw tube tracker used in the COMET experiment has
been built and tested in vacuum. Not
only the detector performance but also
the straw stabilities in vacuum were
investigated. A dedicated electronics
board, including waveform digitiza-tion chips developed with the analogmemory technology, was designed for
future data acquisition in collaboration
with the electronics system group of
KEK-IPNS and its prototype was produced to study the behavior of thesystem. Integration tests of the detector and electronic prototypes are anticipated in 2012.
Study of the superconducting magnet has also advanced significantly in
2011. The aluminum-stabilized superconducting wire used for the pion/muon collection system requires highradiation tolerance. It is known in theliterature that aluminum resistivity deteriorates at cryogenic temperatures
after significant irradiation by neutrons,
but it can be recovered after a thermal
cycle to the room temperature. In order to reconfirm this and optimize themagnet operation procedure, a neutron irradiation test was conducted at
the research reactor of Kyoto University.

Figure 1 shows the change in resistivity
in the aluminum samples. Deteriorationof the resistivity and recovery after thermal cycles has been confirmed in thetest, which provided the COMET experiment with useful information to optimize the magnet operation procedure.
Additionally, a test coil using an aluminum-stabilized super-conducting wire
was fabricated. A series of excitation
tests will be conducted to investigate
the coil’s performance at cryogenic
temperatures in 2012 under the U.S.Japan cooperative research program.
In 2011, the COMET experimentsucceeded in expanding collaboration
by involving more researchers. Thisshould certainly provide a critical boost
towards the successful realization of
the experiment. Currently, the COMET
group plans to start a principal background study, followed by physics dataacquisition in 2016 and a partial construction of the facility.

Fig. 1. Neutron irradiation test facility at cryogenic temperatures in Kyoto University (top left) and a tested aluminumstabilizer sample (top right). Changes of resistivity of two samples with different yttrium doping ratios are shown as afunction of irradiation time (bottom left). Resistivity change of a copper sample is also shown as a reference. Resistivity
recovery in a thermal cycle is demonstrated (bottom right).

Particle and Nuclear Physics

J-PARC Annual Report 201130

Neutrino Experimental Facility
Neutrinos are subatomic particles
with no electric charge, and have thesmallest mass of all known particles.
Neutrinos come in three types, or “flavors”: electron, muon, and tau. As they
travel, neutrinos can transform, or “oscillate”, from one flavor to another. Thisis called “neutrino oscillation”, a consequence of the fact that neutrinos havemass and thus mix with each other. Eachof the neutrino flavor states appears as
a superposition of different mass states,
and the difference in their extremely
small masses causes a periodic change
in flavors during flight.
The Tokai-to-Kamioka (T2K) experiment is a second-generation long-baseline neutrino oscillation experiment.
The primary goal of the T2K experimentis the search for the muon neutrino (νμ)
to electron neutrino (νe) oscillation. Its
probability is described with the mixing angle between the first and third
generations, θ13, which is last unknown
neutrino mixing angle. This θ13 is the key
quantity to explore CP violation of leptons, which is one of the biggest questions of particle physics.
To achieve this objective, T2K directs high-intensity muon neutrino
beams with 99.5% purity. The muon
neutrino beams produced at the neutrino experimental facility in J-PARC are
directed toward the Super- Kamiokande
detector (SK), which is located 295 km
west of J-PARC. SK is the world’s largest
underground neutrino detector, whichcontains 50,000 tons of purified water
as the target for the neutrino beam. The
rare interaction between neutrinos andnuclei in the water can be detected by
the ~11,000 photo-sensors fixed on theentire inner surface. The appearance ofelectrons in the water, charged counterparts of the electron neutrinos, is a clear
sign of the νμ to νe oscillation.
The T2K physics experiment started
in January 2010, and interrupted due tothe Great East Japan Earthquake. T2K
published the first result of the θ13 measurement in July, 2011 based on the datataken until March 11th, 2011. T2K scientists were able to identify 6 electron
neutrino candidate events with data
corresponding to 1.43×1020 POT, while
the estimated number of background
events was 1.5±0.3. they obtained θ13
value of 0.03 < sin22θ13 < 0.28 with 90%
confidence level, the world-first result
indicating non-zero θ13. The T2K experiment’s result for the first time provides
a statistically significant indication of
appearance[1]. This result has been nominated as one of the top ten scientificbreakthroughs of 2011 in Physics World(the physics magazine of the U.K.).
The neutrino facility suffered serious
damage due to the Earthquake. JFY2011
was devoted to the inspection, repair,and re-commissioning of experimental
equipments, as well as damaged buildings and grounds. Fig. 1, 2 and 3 show
some of the recovery works: grounddamages, re-alignment of the proton
beam transport magnets, and inspection of the focusing pulse magnet, socalled the horn. The horns and all otherequipments on the secondary beam line
are highly radio-activated due to thebeam irradiation. Inspections were carried out remotely with cameras, lasers,or through lead-glass window.
From December 24th in 2011, neutrino beam has been produced again(Fig.4). The first neutrino event was observed on Dec.25 by the on-axis neutrino detector INGRID at Tokai, and on Jan.
26, 2012 by SK (Fig.6). The beam powerhas been increasing gradually from a few
kW at the very first re-commissioning to200kW at the beginning of June, which
is more than the beam power before
the earthquake. T2K resumed physics
data taking on March 8th. The history ofdata accumulation in terms of protonson-target (POT) from January 2010 toJune 2012 is shown in Fig.5. The neutrino
beam operation in the early half of 2012
was completed in 9th June as scheduled and the accumulated data after
the earthquake exceed the data took
before the earthquake. The beam quality was measured to be very stable as
before. Alignment of the target and thecollimator, which could not be inspected
optically before the beam re-start due
to accessibility, was also verified using
the proton beam. Some troubles suchas temporal use of an old horn power
supply still remains. The team has been
making efforts towards the full recovery.
The T2K collaboration presented the
new results on νμ to νe oscillation with
the improved analysis method based on
all the available date, which includes thedata took after the earthquake, at theinternational conferences in the summer 2012 such as the XXV International
Conference on Neutrino Physics and Astrophysics (NEUTRINO 2012) in June andthe 36th International Conference on
High Energy Physics (ICHEP2012) in July.
Based on the data collected until 9thJune, 2012, corresponding to 3.01×1020
POT, the number of the observed electron neutrino candidate events become 11 while the expected numberof background events is 3.22±0.43 (Fig.
7). Now the probability of backgroundfluctuation to yield 11 or more events (pvalue) is 0.08% corresponding to a 3.2σ
level of significance, making it extremely
unlikely that a statistical fluctuation isat the origin of the observed events.
The obtained results for θ13 value issin22θ13=0.094 (+0.053 -0.040) assuming
no CP violation in neutrino oscillations
and normal hierarchy of neutrino massstates. The neutrino beam operation
will be resumed after the maintenanceperiod in 2012 summer and T2K expects
to obtained the conclusive (5σ) results of
the non-zero θ13 by summer 2013.

J-PARC Annual Report 2011

Particle and Nuclear Physics

31

Fig. 1a. The collapsed ground due to the earthquake.

Fig. 1b. The ground has been filled and restored.

Fig. 2. Magnet re-alignment: Most of the
proton beam transport magnets
moved several millimeters over the
beam line. They are re-aligned to
the re-designed beam orbit withinmuch better than 1mm.

Fig. 3. The 3rd horn under transportation from the beamline to the maintenance area for inspection. All
the works were done remotely due to the highresidual radio-activity.

Fig. 4. Beam profile at the target front-face for the first beam after
the earthquake. Though slightly off-centered, the beam
hit the target successfully at the very first shot. The red line
shows the target outline.

Particle and Nuclear Physics

J-PARC Annual Report 201132

Fig. 5. Total number of protons delivered to the target for the physics run from January, 2010. The red dots(see right axis) shows POT in a pulse (beam intensity), and the blue line (left axis) shows integrated POT.

Fig. 6. First event in Super-Kamiokande since the earthquake (2:45 AM JST, Jan 26, 2012).

Reconstructed neutrino energy spectrum of theFig. 7. events, which pass all electron neutrino event selection criteria (closed circles), overlaid with the theoretical expectation (histograms). A total 11 events wasobserved, which is well reproduced by assuming electron neutrino appearance signal (red histogram) plus
expected background events.

Cryogenics Section

Cryogenics Section

J-PARC Annual Report 201134

Overview
The cryogenics section supports
scientific activities carried out at JPARC in applied superconductivity andcryogenic engineering. It also supplies
cryogen of liquid helium and liquid

nitrogen. The support work includes
the operation of the superconducting
magnet system for the neutrino beamline, and support of the construction ofa superconducting solenoid magnet

system for the new muon beamline at
the Materials and Life Science Experimental Facility (MLF). An R&D work to
support the future projects in J-PARC isalso very active.

Superconducting Magnet System for the T2K Beamline
The Cryogenics Section operates
the superconducting magnet system
for the T2K neutrino beamline. The operation record for FY 2011 is summarized in Table 1. Although the damageon the SC magnet system due to theGreat East Japan earthquake was relatively minor, the recovery work continued until the end of 2011. It started

with a visual inspection of the system
including an inspection inside thecryostat. The trial operation took placein May 2011 after the initial recovery
work confirmed the system’s viability.
Then rest of the recovery work included magnet re-alignment and routine
maintenance. The system operation
for the physics run started in Decem-ber 2011 and continued until June
2012, except for a short shutdown during the New Year holiday and the beamtime for the Hadron Hall in February
2012. There were 3 system trips due tothe magnet safety system (MSS) errors
in March and May 2012. The cause of
the errors has been mostly fixed andnow the system is operated soundly.

Table 1. Operation history of the superconducting magnet system for the J-PARC neutrino beamline.

Operation
Recovery workand Maintainance
Incidents

2011
2012
Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Trial operation for system check
Beam operation (including physics run)
Damage survey and initial damage recovery
Damage recovery,magnet re-alignment and routine maintainance

Trip due to MSS error:07Mar2012, 15Mar2012, 17May2012
Trip due to power flicker by thunder storm:06May2012

Superconducting Kaon Spectrometer (SKS)The Cryogenics Section also supports the Superconducting Kaon Spectrometer (SKS) operation at the
J-PARC Hadron Hall. The stands of the magnet weredamaged by the earthquake. The magnet which weighs
282 tons, slipped by up to 77 mm on the floor, and 6
bolts on the magnet stand were broken due to the large
shearing force (Figure 1). After investigation and repair,the magnet was cooled down, and excitation tests were
performed. In Feb. and June 2012, the SKS magnet was
operated successfully for physics data collection.
Fig. 1. The Superconducting Kaon Spectrometer (SKS) magnet withbroken bolts (left).

J-PARC Annual Report 2011

Cryogenics Section

35

Construction of the Superconducting Magnet System at MLF
focusing solenoids that will be used in
the same beam lines. The superconducting magnets are being installed at
the MLF in the summer of 2012 and will
start operation in the fall of 2012. The
cryogenics section continuously supports both installation and operation.

The Cryogenics Section supports
construction of the intense ultra-slow
muon beamline in MLF. One of the
major contributions of the cryogenics
section is the development of the superconducting curved solenoid (Figure 2). The section also supports theconstruction of the superconducting

Fig. 2. Superconducting curved solenoid
for ultra-slow muon beamline.

Cryogen Supply and Technical Support
is recovered by the helium gas recovery facility, which is provided andoperated by the Cryogenics Section.
Figure 5 summarizes the liquid helium
supply in FY 2011. The major users ofliquid helium have been the SKS andthe liquid hydrogen target in the Had-

Liquid Helium Supply (L)The Cryogenics Section provides
liquid helium cryogen for physics experiments in J-PARC. The liquid helium
is supplied to the users in collaboration with the Accelerator Division using the helium liquefier owned by the
Accelerator Division. The used heliumron Hall. The helium gas recovery fraction has been better than 90%. Liquid
nitrogen was also supplied to the users
for their convenience and its amountduring the period from April 2011 toJune 2012 was 14100 litters.

4500
4000
3500
3000
2500
2000
1500
1000
500
0

Cryo. SectionMUSE
H2 target
Hadron
SKS
10

11

2011

1

2

3

4

5

6

7

2012

Fig. 3. Liquid helium supply at J-PARC from Oct. 2011 to June 2012.

R&D for the Future J-PARC Project: COMET
A new experiment, COherent
Muon to Electron Transition (COMET)
has been proposed to search for mu-econversion processes using the highintensity proton beam from the Main
Ring. The Cryogenics Section has been
involved in the COMET experiment todevelop the superconducting magnet
system. The project requires a large
aperture solenoid that covers a pion
production target to capture pionswith large acceptance. A solenoid using an aluminum stabilized superconducting cable was proposed. A major
issue for the R&D is that irradiation ofneutrons to the solenoid. The neutron
irradiation test at the Kyoto University
Research Reactor Institute has been
performed to investigate the RRR degradation in stabilizer aluminum andcopper in FY2011. In addition an R&D
coil with aluminum stabilized cablewith radiation hard insulation was fabricated as shown in Figure 3.

Fig. 4. The R&D coil of the capture solenoid
for COMET.

Cryogenics Section

J-PARC Annual Report 201136

R&D for the Future J-PARC Project: New g-2 and HFS
The g-2 project aimed for the precise measurement of the anomalous
magnetic moment of muons has been
proposed by a group of IPNS. This project received stage-1 approval throughthe 13th PAC meeting in FY2011. In thisexperiment, a superconducting solenoid with high field homogeneity better than 0.1 ppm is a key component
to store muons during measurementof their precession frequency. Design
study of the magnet is in progress incollaboration with IPNS and Cryogenics Science Center. Systematic magnetization measurement for structuralcomponents and electrical devices included in the magnet has been carriedout to estimate the error field caused
by each material. In addition, a magnetic field monitoring system using a
NMR probe is also under development,
which is essential for field tuning (Figure 4).

As one of the other experiments
related to muon physics in J-PARC, precise measurement of muonium hyperfine structure (MuHFS) has been also
proposed by a group of IMSS. In thisexperiment, the energy state transitionin muonium will be observed under astatic magnetic field with local homogeneity of 1 ppm. The technical designof this magnet is progressing in collaboration with the Cryogenics Science
Center and the Mechanical Engineer-ing Center (Figure 5). We are repeating
the trial winding of a solenoid coil tolearn how the ideal wire configurationis realized. One of the critical issues toachieve the required field homogeneity is finding ways to reduce the vibration transfer from the cyocoolers. We
have started vibration measurement
using a model cryostat to consider effective coil support structure for low
vibration.

Fig. 5. 
Field monitoring system using a
NMR probe.

Fig. 6. 3D CAD image of a superconducting
magnet for the MuHFS experiment.

Study on Strain Behavior of Superconductors
It is a well known fact that thecritical current densities of HTS (HighTc Superconductors) and A15-type superconductors (Nb3Sn, Nb3Al) for thehigh field magnet beyond 10 T strongly
depend on stress/strain. The Cryogenics Section has been pursuing studies
on the strain behaviors of the Nb3Al
superconductors by the neutron diffraction measurement at the BL-19(TAKUMI) of J-PARC MLF. Recently, theCryogenics Section has developed a
new 50 kN cryogenic load frame in collaboration with the Neutron Science
Section and JAEA. This load frame canprovide a tensile or compressive loadto the superconductor at low temperature of up to 5 K. A beam commissioning of the load frame using a stainlesssteel sample has been completed inJune 2012 and the measurement of
the Nb3Al sample will be made in
October. This load frame is currently
available for other experiments. For
example, an in-situ neutron diffraction

measurement to observe a transitionof a NiFeGaCo sample was performedat the BL-19 with the technical supportof the Cryogenics Section.

Fig. 7. Picture of the cryogenic load frame for the neutron diffraction
measurement at the BL-19 (TAKUMI) of J-PARC MLF.

New KEK central computer 16PB tape robotic library system (IBM TS3500) available for J-PARC users.

Information System

Information System

J-PARC Annual Report 201138

Overview
Since 2002 the J-PARC network infrastructure called JLAN has been operated independently from KEK LAN and
JAEA LAN in terms of logical structure
and operational policy. The Informa-tion System Section designs, manages
and operates the network system andalso has research and development
activity of Authentication System andData Base System for J-PARC. Each Sys-

tem is aiming to be both secure andeasy-to-use ICT (Information Communication Technology) infrastructure for
the J-PARC users and staffs.

Statistics of Network Utilization
JLAN itself sustained quite little
damage during the Great East Japan
earthquake of March 11. The network
facilities, all fiber cables between the
JLAN core network switch and theedge switches deployed around JPARC related buildings and computerresources in KEK avoided serious damages. Therefore, according to the recovery process of each of the J-PARC
buildings, the JLAN switches restarted

their operations as shown in Fig. 1.
In 2011, the total number of hosts
on JLAN reached over 3100 and thenumber has been increasing at a rateof 110% per year. The growth curveof edge switches, wireless LAN accesspoints, and hosts connected to JLAN
are shown in Fig. 2. JLAN has also
played an important role in connecting
the Tokai area, where the main J-PARC
facilities were built, and the Tsukuba

area, where the major computer resources for data analysis are located.
Figure 3 shows the statistics of annual
data transfer between the two sites.
The bandwidth capacity for the connection is currently 2Gbit/s and hasreached almost one thirds of it. So an
early bandwidth capacity increase isdesirable. Figure 4 also depicts the network utilization of the Internet.

200

No. of Recovered Edge Switches

180
160
140
120

No. of Recovered Wireless LAN Access Points

100
80
60
40

The Earthquake

200Mar-11

Apr-11

May-11

Jun-11

Jul-11

Aug-11

Sep-11

Oct-11

Fig. 1. The recovery of JLAN Building Edge Switches.
250

3500
Edge Switches

3000

WLAN Access Points
2500

SW and WLAN AP

No. of hosts
150

2000

1500

100

1000
50
500

0

0
FY2002 2003

2004

2005

2006

2007

2008

2009

2010 FY2011

Number of Hosts, edge SW and wireless AP on JLAN

Fig. 2. Growth of J-PARC network (JLAN).

No. of Hosts connected to JLAN

200

J-PARC Annual Report 2011

Information System

39
1000

Tsukuba->Tokai (2hour average)

Mbit/sec

800

5 min peak

600
400
200
0

Apr-11

May-11

May-11

Jun-11

Jul-11

Aug-11

Sep-11

Oct-11

Nov-11

Dec-11

Jan-12

Feb-12Mar-12

Jan-12

Feb-12Mar-12

1000

Tokai->Tsukuba(2hour average)

5 min peak800

Mbit/sec

600
400
200
0

Apr-11

May-11 May-11

Jun-11

Jul-11

Aug-11

Sep-11

Oct-11

Nov-11

Dec-11

Mbits/sFig. 3. Bandwidth utilization between Tokai campus and Tsukuba campus.
Upper: from Tsukuba to Tokai Lower: from Tokai to Tsukuba.

300

To Internet

250

2h. avg(out)200

peak(out)

150
100
50
0

Mbits/s

Apr-11 May-11 Jun-11

Jul-11

Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Feb-12 Mar-12 Apr-12

300

From Internet

250
2h. avg(in)200

5min peak(in)

150
100
50
0

Apr-11 May-11 Jun-11

Jul-11

Aug-11

Sep-11

Oct-11

Nov-11 Dec-11

Jan-12

Feb-12 Mar-12 Apr-12

Fig. 4. Network utilization to the Internet.

Statistics of Computer Resource Utilization
J-PARC does not have its own computing facility for physics analysis anduses the KEK computing resources of1600 SPECint06 computing power,
150TBytes RAID disks and 2PBytes tapelibraries in the KEK Central computer
system at the Tsukuba site. In the Neutrino (T2K experiment) and Hadron experiments, the data taken in the J-PARC
experimental hall will be temporary

saved at the Tokai site and then promptly transferred to, stored and analyzed at
the system in Tsukuba. The storage ofthe system will also be utilized as a permanent data archive for the Neutrino,
Hadron and MLF experiments. Figures
5 and 6 show the utilization statistics ofthe computer resources in 2011. The
main Hadron users who used the systemconstantly were those who continue

their experiment (Koto Exp. Group) in series from the former KEK 12GeV Proton
synchrotron to J-PARC. The Neutrino experiment group started to use the computing resources soon after the winterruns of 2011 when J-PARC restarted after the earthquake and stored their datareaching a capacity of 100 Tbytes.

Information System

J-PARC Annual Report 2011

40
60

J-PARC neutrino

J-PARC MLF

J-PARC Hadron

Other KEK use

50

Ulizaon (%)

40

30

20

10

0

Fig. 5. 2011 annual utilization of the KEK central computer system by J-PARC
activities. (MLF groups utilization occupied a very small ratio).

TBytes80

GPFS Group Disk u liza on

70

Hadron

60
50
40
30
20

Neutrino (T2K)

10
0

400

TBytes300

MLF
Apr-11 May-11 Jun-11

Jul-11

Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Feb-12 Mar-12

HPSS Tape Library u liza on
Hadron (mainly koto(E14) grp.)

200
100
0

Neutrino(T2K)
MLF
Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Feb-12 Mar-12

Fig. 6. Storage utilization of the KEK central computer
system by J-PARC activities.

Transmutation Studies

Transmutation Studies

J-PARC Annual Report 201142

Activities
Post Irradiation Test
To obtain the irradiation data on
structural materials of spallation target,
an international experimental program
called “STIP” (SINQ Target Irradiation
Program, SINQ; Swiss spallation neutron
source) is in progress[1]. Post Irradiation
Examination (PIE) of ferritic / martensitic(FM) steel F82H and its welded joint
specimens was carried out at the hotlaboratories in the Tokai Researchand Development Centre, JAEA. The
results of tensile tests performed atroom temperature indicated that theirradiation hardening occurred withincreasing the displacement damage
up to 10.1 dpa irradiation at 320°C. At
higher dose (11.8 dpa) in higher temperature (380°C), irradiation hardening
was also observed, but degradation ofductility was relaxed in F82H welded
joint. All specimens kept its ductility
after irradiation and fractured in ductile manner. The results on bend-fatigue tests showed that the fatigue life
(Nf ) of F82H base metal irradiated up
to 6.3 dpa was almost the same withthat of unirradiated specimens. The Nfof the specimens irradiated up to 9.1
dpa was smaller than that of unirradiated specimens. Though the numberof specimen was limited, the Nf of F82H
EB welded joints seemed to increase
after irradiation and the fracture surfaces of the specimens showed transgranular morphology, while F82H TIG
welded specimens were not fractured
by 107 cycles.

tip was done and the obtained profile
will be used for realistic calculationsof dpa-rates. The ultrasonic thickness
measurement of the tip of the beam
window was performed. The information gained will give insight to erosion/
corrosion issues at the beam entrance

window. Preparation and cold test ofsegregation of LBE, cutting of the samples and sample cleaning were progressed. The revised sample extraction
plan was distributed and it became
clear that the sample transport will bescheduled for September 2012.

MEGAPIE
Several meetings on MEGAPIE(MEGAwatt Pilot Experiment) were
held at Paul Sherrer Institute (PSI), Switzerland in June 2011. In the meetings,
PIE of the MEGAPIE target and the related hot-lab activities were reported.
A gamma scan of the AlMg3 safety hull

Fundamental Study for Flow Visualization in Liquid Metals
The beam window of ADS (Accelerator-driven System) is exposed athigh temperature environment by the
proton beam injection. For detailed
design of ADS, grasping the behaviourof flowing LBE (Lead-Bismuth Eutectic
alloy), which is a target/coolant material for JAEA-proposed ADS, is one of
the important issues because the flow
behaviour influences to not only thethermal-fluid behaviour but also theerosion/corrosion of structural materials. The flow behaviour of the coolant is normally predicted by the CFD(computational fluid dynamics) analysis. However, the development of theflow visualization techniques to verify
the result of CFD analysis is insufficientbecause of the difficulties caused by

the physical properties of liquid metal
coolant especially in a high temperature operation.
The Transmutation Section has
been developing flow visualization
techniques. In the case of flow measurement of LBE, precise time resolution that can catch the turbulent
fluctuation is required. The time resolution of the present ultrasonic technique based on the Doppler Effect isabout several tens of millisecond[2].
In the case of our new technique, a velocity profile data is provided by twotimes of signal transmission and reception theoretically, then, time resolution
improves drastically up to several milliseconds[3]. Figure 1 shows the experimental configuration using water atroom temperature and measurement
results by the new method (WCP: Window Chirp Method) compared to thepresent technique (PDM: Pulse Doppler Method). The notation “PNum”
in the fugure is a number of emit/receive pulses per one measurement.
The figure shows that the smallest
PNum case (PNum=8), which means 3
milliseconds of time resolution in LBE,
gives good agreement with the otherresults. The development of the WCP
technique is continued and would bemade use for the improvement of precision of the thermal-fluid analysis forthe coolant system of ADS by obtaining the detailed experimental data of
the flowing LBE.

J-PARC Annual Report 2011

Transmutation Studies

43
1

velocity [m/sec]

PDM
WCP [PNum.=8]
WCP [PNum.=16]
WCP [PNum=.32]

0.5

0

0

0.1

0.2

0.3

0.4

0.5

y/H

Fig. 1. Experimental configuration for water flow measurement and measurement result of comparison experiment with present
technique, where bar of each data is velocity fluctuation.

Estimation of Beam Trip Frequencies
In the design study of ADS, oneof the most important factors is to
reduce the beam-trip frequency ofhigh-power proton accelerator to an
acceptable level. Experiences with existing high-power proton accelerators
have shown that frequent beam trips
have occurred. These beam trips may
cause thermal fatigue in ADS components, which may lead to degradationof their structural integrity and shorten
their lifetime. In our study, acceptablebeam-trip frequencies of the ADS accelerator as a function of beam trip
duration were evaluated. To evaluate
the acceptable beam-trip frequencies,

thermal transient analyses were madeon the thermal responses of reactor
components of ADS. By assuming 70%
of annual plant availability, our results
indicated three acceptable beam-trip
frequencies, depending on the beamtrip duration, t: 2×104 times per year for
0 = t = 10 sec; 2×103 times per year for
10 sec < t = 5 min; and 42 times per year
for t > 5 min.
In order to consider measures
to reduce the beam-trip frequency,
we also estimated the beam trip frequency for the ADS accelerator basedon the operational data of the J-PARC
LINAC,and compared it with the ac-

ceptable beam-trip frequency. Statistics on accidental interruptions of the
J-PARC LINAC were obtained from theoperational data from 16th October,2010 to 11th March, 2011. The total operation time of the LINAC was 2,503
hours. The total number of accidental
interruptions was 1,869. The comparison showed that for beam trips with aduration of 10 sec or shorter, the beamtrip frequency was acceptable. On theother hand, for beam trips with longer
durations of 10 sec < t = 5 min and t >5 min, it was necessary to reduce thebeam-trip frequencies down to lessthan 1/3 and 1/10, respectively.

Development of Polonium Removal Equipment
One of the issues to be taken into
account for LBE application is thesafety management of polonium produced by neutron capture reactions ofbismuth nuclei and/or spallation reactions of LBE. The radiological hazardof polonium is not small because polonium discharges alpha particles, so
it should be considered in detail to ensure the safety of LBE-cooled nuclear
systems. For the safety assessment of

the Transmutation Experimental Facility planned in the J-PARC project, thedecontamination characteristics of polonium should be specified with good
accuracy. Experimental study was performed to estimate the decontamination efficiencies of the polonium by
stainless steel mesh filter and to confirm whether it can be a useful device
for the polonium removal in the gas
phase or not[4].

The LBE samples were irradiatedat the JRR-4 research reactor in JAEA.
The estimated specific radioactivity
by polonium-210 (138 days of half-lifeand emits alpha particle with energy of
5.3 MeV) in the samples was less than
50 Bq/g during the experiments. Twotypes of stainless wire meshes with different mesh pitch were used as polonium filters. The neutron-irradiated LBE
sample in a graphite crucible was set

Transmutation Studies

J-PARC Annual Report 201144
into the heating device in the vacuum
vessel shown in Fig.2 and was heated
to melt the LBE to evaporate the polonium into gas phase. The radioactivityof polonium trapped by the mesh fil-ter was measured by a semiconductoralpha-ray spectrometer.
It was shown that the DF (Decontamination Factor) of polonium wasmore than 170, which meant that 99.4%

of polonium in the gas phase can be removed at 328 °C of filter temperature.
The experiments confirmed that thestainless mesh filter can be a useful device for the removal of polonium.

Fig. 2. Polonium evaporation test device

References[1] S.Saito, K.Kikuchi, D.Hamaguchi,
K.Usami, A.Ishikawa, Y.Nishino, S.Endo,
M.Kawai, Y.Dai, “Proton irradiation
effects on tensile and bend-fatigue
properties of welded F82H specimens”,
J.Nucl. Mater., 398(2010)49–58.

[2] Y.Takeda, “Measurement of velocity
profile of mercury flow by ultrasoundDoppler shift method”,
Nucl. Tech.79, pp.120-124, 1987.
[3] Y.Takeda et al., “Ultrasonic Doppler Velocity Profiler for Fluid Flow”,
Springer, 2012. (under publication adjustment)[4] T.Obara, Y.Yamazawa and T.Sasa, “Polonium decontamination performanceof stainless steel mesh filter for leadalloy-cooled reactors”, Prog. Nucl. Energy, 53, pp.1056-1060 (2011).

SafetySafety

J-PARC Annual Report 201146

General Safety
The General Safety Section performs various types of crisis and occupational safety managements, andprovides safety educations, training
and drills in cooperation with the JAEA
Nuclear Science Research Institute andthe KEK Tokai Campus.
Specifically, it conducted the crisis management of the impact of theGreat East Japan Earthquake in Japanese fiscal year (JFY) 2011.

Crisis Management
J-PARC was severely damaged in
the Great East Japan Earthquake on
March 11th, 2011. Fortunately, there
were no human casualties, but many
problems in the crisis management
procedures were revealed on that day.
As a result of these indications, the cri-

sis management system, action plan,and equipment arrangement for disasters were mainly revised according to
the Guidelines for Actions in the Eventof Earthquakes. In the guidelines, acommand post and an emergency assembly area were newly assigned at 15m above sea level, to be used in caseof a severe earthquake and tsunami
warning. The provision for an expert
meeting on fire and disaster prevention under the General Safety Review
Board of J-PARC was established.
In November 2011, a special evacuation drill was carried out with the
Nuclear Science Research Institute under the new guidelines, and over 600
participants were called-over in the
drill at the emergency assembly area.
Some problems such as equipment for

Photo 1. Special evacuation drill (1).

called-over, were pointed out again(see Photos 1 and 2).

Safety Educations
In JFY 2011, the reconstruction of
J-PARC has been speeded up to restart
the operation from the end of 2011.
Therefore, many accidents occurred
during the crane work. In order to prevent further accidents, safety courses
for those having the licenses of thecrane operation and the slinging work
were newly provided to operators,
workers, supports and supervisors on
February 6-7, 2012 and October 24-25,
2011, respectively. One hundred men
in all took the courses. As a result, nomore crane work accidents occurred.

Photo 2. Special evacuation drill (2).

Radiation Safety
A part of the radiation safety equipments in J-PARC were damaged by theearthquake disaster. The power andoptical fiber cables laid undergroundbetween the building and the radiation area monitor got twisted as a result of the earthquake. Photo 3 shows
an example of a damage caused by theearthquake. The base of the radiation
area monitor subsided by about 50
centimeters. Photo 4 shows the radiation area monitor after the restoration
work. New concrete base was placed,
and the new power and the opticalfiber cables were constructed. Aftercompletion of the restoration works of

the radiation safety equipments, theirnormal operations could be restored
because it was confirmed that theircomponents were reliable.
J-PARC is managed under the Law
Concerning Prevention from Radiation
Hazards Due to Radio-Isotopes, etc. in
the Japanese legal system. A license

J-PARC Annual Report 2011

Safety47
for its use must be issued by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), and therelated safety inspection must be conducted by the Nuclear Safety Technology Center (NUSTEC). Table 1 showslists of licenses at the end of fiscal year
2010 and application items for licensein JFY 2011.
The 11th Radiation Safety Committee of J-PARC met on July 29, 2011 anddiscussed the alterative application of
the J-PARC facilities. The main topic
was the new secondary beam line (BL09) in MLF. These applications were
submitted to MEXT on Sep. 16, 2011.
The application for the operation of all
the facilities was approved by MEXT on
Nov. 25, 2011.

The 12th Radiation Safety Committee of J-PARC met on Dec. 2, 2011 andinspected the status of the equipmentson the secondary beam lines of the experimental facilities (MLF, Hadron Experimental Facility (HD)).
The inspection of MLF was conducted successfully on Feb. 6 and 7,
2012 by NUSTEC: the items to be inspected were the working conditionsof the emergency and interlock signals
from the new secondary beam lines(U-Line and BL-09) and the shielding
structures and measurements of ambient doses around the radiation control
areas.
The inspection of HD was conducted successfully on Feb. 21, 2012,
by NUSTEC: the items to be inspected

Photo 3. Radiation area monitor above the 3NBT Dump.

were the shielding structures and measurements of ambient doses aroundthe radiation control areas. This inspection was related to the application
submitted in 2010.
Figure 1 shows the transition of
the number of radiation workers since2005. In JFY 2011, 2633 individuals
were registered as radiation workers in
J-PARC. Table 2 shows the distributionof annual doses by type of workers.
The radiation exposure of the workers has been monitored individuallywith glass dosimeters and solid state
nuclear track detectors. Almost all therecords for individual exposure wereundetectable, while 126 persons (4.8%of the workers) were recorded to havereceived less than 5.0 mSv.

Photo 4. Radiation area monitor after the restoration work.

Table 1. License at the end of fiscal year 2010 and application items for license in fiscal year 2011.

License at the end of fiscal year 2010

Application items for license in
fiscal year 2011

MLF

Power : 3 GeV/320 kW
Secondary beam lines (neutron) : 17
Secondary beam lines (muon) : 1

Secondary beam lines (neutron) : 1

HD

Power : 30 GeV/50 kW
Secondary beam lines (meson) : 4

Neutrino facilities

Power : 30 GeV/300 kW

Safety

J-PARC Annual Report 201148
Number of radiation workers
3000

2653

2633

FY2010FY2011

Number of radiation workers

2500

Male

Female

2154
1864

2000

1500

1000

704
408

500

61
0
FY2005

FY2006

FY2007

FY2008FY2009Fiscal Year

Fig. 1. Transition of the number of radiation workers.

Table 2. Distribution of annual doses by the type of worker in fiscal year 2011.
Dose range (mSv)
>0.5
- 1.0

>1.0
- 5.0

Total
workerCollective
dose(person-mSv)

Averagedose(μSv)

Undetectable

0.1
- 0.5

In-house staff

544

26

9

0

0

579

12.3

21.2

User

397

0

0

0

0

397

0

0

>5.0+

Contractor

1566

63

19

9

0

1657

44.4

26.8

Total

2507

89

28

9

0

2633

56.7

21.5

Users OfficeUsers Office

J-PARC Annual Report 201150
The Japanese fiscal year (JFY) 2011
for the J-PARC Center Users Office (UO)
started with the catastrophic consequences of the massive earthquake
casting a dark shadow over it. The
number of the users in April, counted
by person-days, was 167 as opposedto the previous year’s 2620. However
an ambitious recovery plan was developed and implemented and beam was
extracted to the neutron and neutrino
experimental facilities on schedule in
December 2011. Although the number of annual users in JFY 2011 counted by person-days was 15,539, down
about 46% from the previous year, thenumber of users increased rapidly inJanuary 2011 to more than the level ofthe previous year.
Talking about JFY 2011, we incline
to focus on the consequences of themassive earthquake and the process ofrecovery. However UO staffs committed themselves mostly to conducting,in JFY 2011, UO business which had
been developed since its inception.
That is why we need to focus on it toreport the activities UO conductedin JFY 2011. The prime purpose of
J-PARC is to conduct cutting-edge
research in various scientific fields using the secondary beams. The fields
includes, but are not restricted to, a)
nuclear and particle physics, b) materials and life science, and c) R&D for
nuclear transformation. Four different
secondary beams have already beenoffered; neutron (since May, 2008);
muon (since September, 2008); kaon(since February, 2009); and neutrino(since April, 2009). As the stability andthe types of available beams have increased, many users from all over theworld have come to work at J-PARC.

Although the purposes of their visitsor the experimental facilities they use
differ, UO has been making efforts toprovide lucid procedures or service.
Among them are proposal submission, proposal review notification,user registration, pre-visit procedures,procedures upon arrival and post-visit
procedures. Web-based systems havebeen adopted and operated as one of
the effective ways to achieve our aim
and three system engineers have been
engaged in their operation and development. Although the systems enable
the J-PARC Users to conduct most of
the procedures through the web page,
there are manual work jobs UO staffs
need to do, which UO staffs committed
themselves to in JFY 2011.
The following are the details of thework UO performed in JFY2011.

User Registration and Pre-visit Procedures
The first procedure, in which theusers are involved, is user registration.
When we received a user registration,
we confirmed its eligibility and approved it through the systems, whichenabled the user to proceed to thenext step which includes application
for a J-PARC visit. The application for a
J-PARC visit includes an application foraccommodation reservation. The main
accommodation for users has been
the Tokai dormitory which opened in
January 2011. Online booking wasavailable and a room number for eachuser was automatically assigned. But
sometimes we used to receive inquiries about sudden booking or sudden
check in/out day change which thesystem could not accept. In those cases we did what we could to meet therequests, sometimes booking rooms

or changing the check in/out days
after the deadline. In case of full occupancy at the Tokai dormitory whenusers requested that we book anotheraccommodation we had, we asked thedepartment in charge to provide alternative options. Users who are scheduled to work at radiation controlledareas apply for individual dosimeters.
When we received the applications, wechecked and forwarded them to thedepartment responsible for issuing individual dosimeters and arranged andconducted safety instructions for workat J-PARC. We issued a temporary JPARC User ID Card to users who werescheduled to get on the J-PARC shuttle
bus before getting the J-PARC User ID
Card. Foreign users need to submit
a Foreign National Visit Proposal. We
checked its eligibility followed by anapproval from the person in charge.
We issued car driving permission pass
to users who needed to go into the JPARC site by their cars. And when theyneeded to enter the experimental facilities after the office hours or during
the weekend, we issued J-PARC card
keys for unlocking them. There weresome users who needed letter of guarantee or certificate of eligibility to get
visa. We issued the letters or applied
for certificates of eligibility with an immigration bureau to help them get avisa. As for travel expenses support,inter-university research users whom
KEK had accepted were able to apply
for travel expenses. Having received
the applications, we calculated theamount of it.

J-PARC Annual Report 2011

Users Office

51

Procedures Upon Arrival
Since UO provides one-stop services to users, they come to UO before
starting works at J-PARC to receive a
J-PARC User ID Card, individual dosimeter, car driving permission passor J-PARC card key. For those who
could not come to UO during the office hours (9:00-17:00), we arranged forthem a pick up at the JAEA main gate
24 hours a day. We lent out bikes andPHS (handy phone for internal calls at
J-PARC). Those who could not returnthem to UO during the office hours
could drop them into a return box
standing beside UO.

them to the persons who approved
them. In the case of nonproprietaryuse, a principal investigator needs tosubmit a MLF experimental report via
the result management system within

60 days from the day the MLF machinetime completion form is approved. UO
checks and forwards them to the persons who approved them.

J-PARC to visitors, government ministries, and executives of JAEA or KEK.
So we updated them regularly. Whenother user statistics were necessary, we

produced them.

Post-visit Procedures
When a MLF experiment is completed, the principal investigatorneeds to submit a MLF machine timecompletion form via the User Support
System. We checked and forwarded

User Statistics
Collecting fundamental user statistics was an integral part of the UO
tasks. They were helpful when we
needed to explain the work of UO or

Others
We closed the Tokai dormitory’sbooks every day.
When users got sick or injured andwanted to go to a hospital, we tookthem to it.

(1) Users in 2011 (according to organizations, person-days)
Japanese Universities
Public Organizations
Private Enterprises
Foreign Organizations

6,516
2,000

7,908

Japanese Universities

1,800
1,600

Public Organizations

1,400
1,200

691
424

Private Enterprises

1,000
800

Foreign Organizations

600
400
200
0
4
2011

5

6

7

8

9

10

11

12

1
2012

2

3

Users Office

J-PARC Annual Report 201152(2) Users in 2011 (according to facilities, person-days)
MLF
HadronNeutrino
Accelerator

1,045

2,058

2,000

4,105
8,331

1,800

MLF

1,600

Hadron

1,400
1,200

Neutrino

1,000

Accelerator

800
600
400
200
0
4
2011

5

6

7

8

9

10

11

12

1
2012

12

1
2012

2

3

(3) Users in 2011 (Japanese · Foreiners, person-days)
3,000

Foreigners
2,500Japanese

2,000
1,500
1,000
500
0
4
2011

5

6

7

8

9

10

11

2

3

User Program

User Program

J-PARC Annual Report 201154

1. Proposal Reviewing System for the MLF User Program
J‐PARC Steering Committee
Users
ProposalAcceptance andResult Notification

Proposal
Submitting

J‐PARC Center

Proposals to
Ibaraki‐Prefecture
Beam Lines arereviewed by MLF‐PAC.

J‐PARC
Director

Users Office

MLF Advisory BoardKEK Inter‐University
Research Use Programs arereviewed by MLF‐PAC.
KEK IMSS director shallapprove the results.

Neutron Science
Proposal Review Committee

Muon Science
Proposal Review Committee

Sub‐Committees

Sub‐Committees

Referees

Referees

JAEA entrusts review
of its own program
to MLF‐PAC.

Call for proposals for the first half of 2011 (2011A term): Nov. 17 - Dec. 7, 2010
The review results were announced on April 28, 2011.
Call for proposals for the second half of 2011 (2011B term): July 17 - Aug. 7, 2011
The review results were announced on December 22, 2011.

2. Summary of Applications and Results (MLF)
The number of proposals andbeam time for each neutron and muon
instrument are summarized in Fig. 2, 3,
4 and 5. For the neutron instruments
BL-03 and BL-20 operated by Ibaraki
Prefecture, a specific program is con-ducted by Ibaraki Prefecture separately. The statistics for the specificprogram provided by Ibaraki prefecture is also included in this summary.
Ambitious recovery plan frommassive earthquake took us about 9months to extract beam to neutron
experimental facilities, which is why
no 2011A beam time was actually allocated and proposals and beam timefor 2011B were less than had been expected.

(1) 2011A
Not Accepted
Specific Program for BL03 andBL20 by Ibaraki Prefecture

50
45

Not Accepted
40

Instrument Development/Project
Use

Number of Proposals

35

General Use (accepted)
Specific Program for BL03 andBL20 by Ibaraki Prefecture

30
25

General Use (accepted)

20
15
10
5
0
BL-01

BL-03

BL-04

BL-08

BL-10

BL-12

BL-14

Instruments

BL-16

BL-19

BL-20

BL-21

D1࡮D2

J-PARC Annual Report 2011

User Program

55
Not Accepted
Specific Program for BL03 and BL20
by IbarakiPrefecture
Not Accepted

160
140

Instrument Development/Project
Use
General Use (accepted)
Specific Program for BL03 and BL20
by Ibaraki Prefecture
General Use (accepted)

Beam Time (days)

120
100
80
60
40
20
0
BL-01

BL-03

BL-04

BL-08

BL-10

BL-12

BL-14

BL-16

BL-19

BL-20

BL-21

D1・D2

Instruments(2) 2011B

18

Not Accepted
Specific Program for BL03 and BL20
by Ibaraki Prefecture

16

Not Accepted

14

Instrument Group/Project Use

12
10

General Use (accepted)
Specific Program for BL03 and BL20
by Ibaraki Prefecture

8

General Use (accepted)

Number of Proposals

20

6
4
2
0
BL-01

BL-02

BL-03

BL-04

BL-08

BL-10

BL-12

BL-14

BL-15

BL-16

BL-17

BL-19

BL-20

BL-21 D1・D2

Instruments

Not Accepted
Specific Program for BL03 and BL02
by Ibaraki Prefecture

70

Beam Time (days)

60

Not Accepted

50

Instrument Group/Project Use

40

General Use (accepted)
Specific Program for BL03 and BL20
by Ibaraki Prefecture

30

GeneralUse(accepted)

20100BL-01 BL-02 BL-03 BL-04 BL-08 BL-10 BL-12 BL-14 BL-15 BL-16 BL-17 BL-19 BL-20 BL-21 D1・D2

Instruments

User Program

J-PARC Annual Report 201156

3. Access Mode for MLF Use(1) General use
The general use provides both national and international users with anopportunity to conduct experiments
using instruments of MLF. A variety
of experiments not only for academic
researches but also for industrial applications are acceptable. The applicantsmust be an employee of or affiliatedwith a legal organization or entity that
may be any of the following:• A public or private college, university or other institution of higher
education;• A public or not-for-profit researchorganization;• A private company
A post-doctoral fellow is also eligible to submit proposals under thepermission of his/her manager or su-

pervisor at the home institute/organization to conduct research activity at
MLF. Students or persons who do notbelong to any institution/organization
are not eligible for the position of aprincipal investigator.
(2) Project use
The project use is the access modein which JAEA and KEK conduct their
mission oriented programs such as
inclusive scientific research projects,
research programs proposed to fulfill the plans for the midterm goals of
JAEA, joint research programs and contract research programs with anotherinstitute(s)/organization(s).
The experimental proposals requesting beamtime longer than one year canbe applicable for the project use.

The principal investigator of the
project use is limited to the personnel
belonging to either JAEA or KEK, or the
person approved by the director of the
J-PARC Center.
(3) Instrument group use
The instrument group use is theaccess mode for instrument scientists
responsible for the beam-line instruments.
The instruments group shall maintain and/or improve the performanceof their instrument, and conduct theleading-edge research and development whose output shall ensure maximal performance of the instrument sothat MLF can always provide the users
with the most superior experimental
environments.

4. Types and Categories of MLF Use
In principle, a call for proposals for
the MLF use will be conducted periodically as “Regular proposal”. The otheroptional proposals, such as “Urgent
proposal” and “Rapid access proposal”,
are proposals designed to address theneed for research, which is importantand urgent.
There are two categories to access to these proposals at MLF. One
is the nonproprietary use in which no
beamtime fee is charged for the peerreviewed proposal as long as the user
publish the result obtained throughthe MLF use in the open literature. The
other is the proprietary use in which users can get exclusive rights to possess
their results for economic benefit by
paying beamtime fee to J-PARC Center.
The beamtime fee is determined on thebasis of the full cost recovery.

5. Process for Approving Experimental Programs in Particle and Nuclear Physics
Council for IPNS

Institute of Particle
and Nuclear Studies(IPNS) at KEK

elect
the members

Program Advisory Committee 㽴
(PAC)

IPNS
Director

㽲 Submission
㽳 Evaluation Request
㽴 Evaluation Request
㽵 Evaluation Result
㽶 Evaluation Report
㽷 Reply to Users

㽳
J‐PARC Center
㽶
㽷

㽵

㽲

J‐PARC User

The twelfth Program Advisory Committee (PAC) meeting was held on July 8 – 10, 2011.
The thirteenth PAC meeting was held on January 13 – 15, 2012.
The fourteenth PAC meeting was held on March 16 – 17, 2012.

J-PARC Annual Report 2011

User Program

57

6. Approval Summary of the Particle and Nuclear Physics Experiments
After the 13-th Meeting (January 13, 2012)(Co-)
Spokespersons

Affiliation

Title of the experiment

Approval status Slow line priority(PAC recomDay1 Beamline
Day1
mendation)
Priority

E03

K.Tanida

SNU

Measurement of X rays from X- Atom

Stage 2

K1.8

P04

J.C.Peng;
S.Sawada

U.of Illinois at Urba- Measurement of High-Mass Dimuon Production at the 50na-Champaign; KEK GeV Proton Synchrotron

DeferredPrimary

E05

T.Nagae

Kyoto USpectroscopic Study of X-Hypernucleus, 12XBe, via the
12C(K−, K+) Reaction

Stage 2

E06

J.Imazato

KEK

Measurement of T-violating Transverse Muon Polarization in
K+ -> p0 m+ n Decays

Stage 1K1.1BR

E07

K.Imai,K.Nakazawa,
H.Tamura

JAEA,
Gifu U,
Tohoku U

Systematic Study of Double Strangeness System with an
Emulsion-counter Hybrid Method

Stage 2

K1.8

Day1

1

K1.8

E08

A.Krutenkova ITEP

Pion double charge exchange on oxygen at J-PARC

Stage 1K1.8

E10A. Sakaguchi,
T. Fukuda

Osaka U

Production of Neutron-Rich Lambda-Hypernuclei with the
Double Charge-Exchange Reaction (Revised from Initial P10)

Stage 2

K1.8

E11

T. Kobayashi

KEK

Tokai-to-Kamioka (T2K) Long Baseline Neutrino Oscillation
Experimental Proposal

Stage 2neutrino

E13

T.Tamura

Tohoku U

Gamma-ray spectroscopy of light hypernuclei

Stage 2

E14

T.Yamanaka

Osaka U

− Experiment at J-PARC
Proposal for KL -> π0 n nStage 2

Day1

2

K1.8

E15

M.Iwasaki,
T.Nagae

RIKEN,
Kyoto UA Search for deeply-bound kaonic nuclear states by in-flight
3He(K−, n) reaction

Stage 2

E16

S.Yokkaichi

RIKEN

Electron pair spectrometer at the J-PARC 50-GeV PS to explore the chiral symmetry in QCD

Stage 1

E17

R.Hayano,
H.OutaU Tokyo, RIKEN

Precision spectroscopy of Kaonic 3He 3d->2p X-rays

Stage 2

E18

H.Bhang,
H.Outa,H.ParkSNU,
RIKEN,KRISS

Coincidence Measurement of the Weak Decay of 12LC andthe three-body weak interaction process

Stage 2

E19

M.Naruki

KEKHigh-resolution Search for Θ+ Pentaquark in p-p -> K-X ReacStage 2
tions

E21

Y.KunoOsaka U

An Experimental Search for μ − e Conversion at a Sensitivityof 10−16 with a Slow-Extracted Bunched BeamStage 1

New
beamline

E22

S. Ajimura,
A.Sakaguchi

Osaka U

Exclusive Study on the Lambda-N Weak Interaction in A=4
Lambda-Hypernuclei (Revised from Initial P10)

Stage 1

K1.8

T25

S.Mihara

KEK

Extinction Measurement of J-PARC Proton Beam at K1.8BR

Test Experiment

P26

K.Ozawa

U TokyoSearch for ω-meson nuclear bound states in the π-+AZ ->n+(A-1) ω(Z-1) reaction, and for ω mass modification in the
in-medium ω->π0γ decay

Stage 1

E27

T.Nagae

Kyoto UP29

H.Ohnisi

RIKEN

E31

M.NoumiOsaka USpectroscopic study of hyperon resonances below KN threshStage 1
old via the (K−, n) reaction on Deuteron
Test Experiment

KL
Day1

K1.8BR
High pDay1

K1.8BR
K1.8

Day1

will be coordinated by JPNC

K1.8

K1.8BR
K1.8

Search for a nuclear Kbar bound state K−pp in the d(p+, K+)
Stage 2
reaction− + AZ -> φ +Search for φ-meson nuclear bound states in the pStage 1(A-1) φ(Z-1) reaction

K1.8
K1.1
K1.8BR

T32

A. Rubbia

ETH, Zurich

Towards a Long Baseline Neutrino and Nucleon Decay Experiment with a next-generation 100 kton Liquid Argon TPC
detector at Okinoshima and an intensity upgraded J-PARC
Neutrino beamschedule andbeam time will
be coordinatedby JPNC

P33

H. M. SHIMIZU

KEK

Measurement of Neutron Electric Dipole Moment

Deferred

Linac

P34

N. Saito,
M. Iwasaki

KEK,
RIKEN

An Experimental Proposal on a New Measurement of theMuon Anomalous Magnetic Moment g-2 and Electric Dipole
Moment at J-PARC

Stage 1MLF

E36

S.Shimizu

Osaka

Measurement of Γ(K+ -> e+ν)/Γ(K+ -> μ+ν) and Search forheavy sterile neutrinos using the TREK detector system

Stage 1K1.1BRP40

K.MiwaTohoku U

Measurement of the cross sections of Σp scatterings

Stage 1

K1.8

K1.1BR

User Program

J-PARC Annual Report 2011

58
(Co-)
Spokespersons

Affiliation

Title of the experiment

Approval status Slow line priority(PAC recomDay1 Beamline
Day1
mendation)
Priority

P41

M.Aoki

Osaka U

An Experimental Search for μ − e Conversion in Nuclear Field
Deferred
at a Sensitivity of 10−14 with Pulsed Proton Beam from RCS

MLF

P42

J.K. Ahn

Pusan National U

Search for H-Dibaryon with a Large Acceptance Hyperon
DeferredSpectrometer

K1.8

T43

K.AokiRIKEN

Test of Hadron Blind Detector and GEM Tracker for the J-PARC Test ExperiE16 Experiment
ment

K1.1BR

P39

K.Sakashita

KEK

A study of water Cherenkov detector for counting the number to be Decidedof neutrino at Near detector hall of J-PARC neutrino beam-line by E11 and Lab

neutrino

P40

K.MiwaTohoku U

Measurement of the cross sections of Σp scatterings

Deferred

K1.8

Osaka U

An Experimental Search for μ - e Conversion in Nuclear Field
Deferred
at a Sensitivity of 10-14 with Pulsed Proton Beam from RCS

MLF

P41

M.AokiOrganization and Committees

Organization and Committees

J-PARC Annual Report 201160

Organization Structure(as of April 2011)
Accelerator Section㸇
L: H. Oguri
Accelerator Section㸈
L: M. Kinsho
Accelerator Division
L: K. Hasegawa
DL: T. Koseki

Abbreviations
L: Leader
DL: Deputy Leader

Accelerator Section㸉
L: N. Ouchi
Accelerator Section㸊
L: K. Kikuchi
Accelerator Section㸋
L: F. Naito
Accelerator Section㸌
L: N. Yamamoto
Neutron Source Section
L: M. Futakawa
DL: H. Takada

Materials and Life
Science Division
L: M. Arai
DL: H. Seto
DL: T. Kato

Neutron Science Section
L: T. Kamiyama
DL: K. Aizawa
Nertron Instrument Section
L: K. Soyama
Muon Science Section
L: Y. Miyake

JAEA President

Deputy Director,
J-PARC Center
Y. Ikeda

Particle and Nuclear
Physics Division
L: T. Kobayashi
DL: N. Saito

Steering Committee
International Advisory
Committee
Safety Committee

Transmutation Section
L: H. Oigawa
DL: K. Tsujimoto

Director,
J-PARC Center

Cryogenics Section
L: T. Ogitsu

S. Nagamiya

KEK Director General

Deputy Director,
J-PARC Center

Safety Division

K. Nishikawa

L. T. Miura
DL: H. Nakashima

Users Consultative
Committee

Radiation Safety Section
L: Y. Miyamoto
Health and General Safety
Section
L: T. Kihara
Management Supporting
Section
L: T. Kato
Information System
Section
L: A. Manabe
DL: K. Gorai
Public Relations Section
L: K. Suzuki

Administration Division
L: T. Takahashi
DL: S. Shinohara

General Affairs Section
L: S Shinohara
DL: Y. Kujiraoka
Users Affairs Section
L: K. Fujita
DL: Y. Togo
Users Office Team
Utilization
Promotion TeamInternational
Relations TeamJ-PARC Annual Report 2011

Organization and Committees

61

Members of the Committees Organized for J-PARC(as of March, 2012)

1) Steering Committee
Hideo Hirayama

High Energy Accelerator Research Organization, Japan

Toshio Ichimura

Japan Atomic Energy Agency, Japan

Yukihide Kamiya

High Energy Accelerator Research Organization, Japan

Shoji Nagamiya

J-PARC Center, Japan

Hideki Namba

Japan Atomic Energy Agency, Japan

Sohei Okada

Japan Atomic Energy Agency, Japan

Osamu Shimomura

High Energy Accelerator Research Organization, Japan

Yasuhide Tajima

Japan Atomic Energy Agency, Japan

Fumihiko Takasaki

High Energy Accelerator Research Organization, Japan

Hideaki Yokomizo

Japan Atomic Energy Agency, Japan

Keisuke Yoshio

High Energy Accelerator Research Organization, Japan

2) International Advisory Committee
Ian Anderson

Oak Ridge National Laboratory, USA

Sergio Bertolucci

CERN, Switzerland

Bernard Frois

CEA-Saclay, France

Hidetoshi Fukuyama

Tokyo University of Science, Japan

Young-Kee Kim

Fermi National Accelerator Laboratory, USA

Hugh Montgomery

Thomas Jefferson National Accelerator Facility, USA

Jean-Michel Poutissou

TRIUMF, Canada (chair)Thomas Roser

Brookhaven National Laboratory, USA

Tsumoru Shintake

Okinawa Institute of Science and Technology Graduate University, Japan

Hoerst Stoecker

GSI, Germany

Tomohiko Iwasaki

Tohoku University, Japan

Andrew Taylor

Rutherford Appleton Laboratory and ISIS, UK

Eiko Torikai

University of Yamanashi, Japan

John W. White

Australian National Laboratory, Australia

Organization and Committees

J-PARC Annual Report 2011

623) User Consultative Committee for J-PARC
Hiroaki Aihara

University of Tokyo, Japan

Masatoshi AraiJapan Atomic Energy Agency, Japan

Hideto Enyo

RIKEN, Japan

Yasuhiko Jujii

CROSS, Japan

Toshiharu Fukunaga

Kyoto University, Japan

Makoto Hayashi

Ibaraki Prefecture, Japan

Tomohiko Iwasaki

Tohoku University, Japan

Shinichi Kamei

Mitsubishi Research Institute, Inc., Japan

Toshiji Kanaya

Kyoto University, Japan

Yoshiaki Kiyanagi

Hokkaido University, Japan

Takashi Kobayashi

High Energy Accelerator Research Organization, Japan

Yasuhiro Miyake

High Energy Accelerator Research Organization, Japan

Tomofumi Nagae

Kyoto University, Japan

Tsuyoshi Nakaya

Kyoto University, Japan

Kazuma Nakazawa

Gifu University, Japan

Nobuhiko Nishida

Tokyo Institute of Technology, Japan

Kazumi Nishijima

Mochida Pharmaceutical Co., Ltd., Japan

Naohito Saito

High Energy Accelerator Research Organization, Japan

Mamoru Sato

Yokohama City University, Japan

Mitsuhiro Shibayama

University of Tokyo, JapanJun Sugiyama

Toyota Central R&D Labs., Inc., Japan

Hirokazu Tamura

Tohoku University, Japan

Eiko Torikai

Yamanashi University, Japan

Kazuyoshi Yamada

Tohoku University, Japan

Taku Yamanaka

Osaka University, Japan

4) Accelerator Technical Advisory Committee
David Findlay

Rutherford Appleton Laboratory, UK

John Galambos

Oak Ridge National Laboratory, USA

Ronald Garoby

CERN, Switzerland

Stephen Holmes

Fermi National Laboratory, USA

Akira Noda

Kyoto University, Japan

Peter Ostroumov

Argonne National Laboratory, USA

Uli Ratzinger

Frankfurt University, Germany

Thomas Roser

Brookhaven National laboratory, USA (chair)

Jie Wei

Michigan State University, USA

J-PARC Annual Report 2011

Organization and Committees

635) Neutron Advisory Committee
Kurt Clausen

Paul Scherrer Institut, Switzerland

John Haines

Oak Ridge National Laboratory, USA

Toshiji Kanaya

Kyoto University, Japan

Mahn Won Kim

KAIST, Korea

Yoshiaki Kiyanagi

Hokkaido University, JapanDan Neumann

National Institute of Standards and Technology, USA (chair)

Robert Robinson

Australian Nuclear Science and Technology Organization, Australia

Uschi Steigenberger

ISIS, UK

Werner Wagner

Paul Scherrer Institute, Switzerland

6) Muon Science Advisory Committee
Jun Akimitsu

Aoyama Gakuin University, Japan

Hiroshi Amitsuka

Hokkaido University, Japan

Robert Cywinski

University of Huddersfield, UK

Elvezio Morenzoni

Paul Scherrer Institute, Switzerland (chair)Jean-Michel Poutissou

TRIUMF, Canada (chair)

Atsushi Shinohara

Osaka University, Japan

Jeff E. Sonier

Simon Fraser University, Canada

Eiko Torikai

University of Yamanashi, Japan

7) Radiation Safety Committee
Yoshihiro Asano

RIKEN, Japan

Shuichi Ban

High Energy Accelerator Research Organization, Japan

Hideo Hirayama

High Energy Accelerator Research Organization, Japan

Kenjiro Kondo

High Energy Accelerator Research Organization, Japan

Takeshi Murakami

National Institute of Radiological Science, Japan

Tetsuo Noro

Kyushu University, Japan

Takeo Oku

Japan Atomic Energy Agency, Japan

Kotaro SatohHigh Energy Accelerator Research Organization, Japan

Seiichi Shibata

Kyoto University, Japan (chair)Toshio Ichimura

Japan Atomic Energy Agency, Japan

Yoshitomo Uwamino

RIKEN, Japan

Yoshihiro Yamaguchi

Japan Atomic Energy Agency, Japan

Organization and Committees

J-PARC Annual Report 2011648) MLF Advisory Board
Masatoshi AraiJapan Atomic Energy Agency, Japan

Yasuhiko Fujii

CROSS, Japan

Toshiharu Fukunaga

Kyoto University, Japan

Masatoshi Futakawa

Japan Atomic Energy Agency, Japan

Makoto Hayashi

Ibaraki Prefecture, Japan

Mitsuhiro Hirai

Gunma University, Japan

Susumu Ikeda

High Energy Accelerator Research Organization, Japan

Yujiro Ikeda

Japan Atomic Energy Agency, Japan

Kazuaki Iwasa

Tohoku University, Japan

Masahiko Iwasaki

RIKEN, Japan

Ryosuke KadonoHigh Energy Accelerator Research Organization, Japan

Kazuhisa Kakurai

Japan Atomic Energy Agency, Japan

Shinichi Kamei

Mitsubishi Research Institute, Inc., Japan

Takashi Kamiyama

High Energy Accelerator Research Organization, Japan

Toshiji Kanaya

Kyoto University, Japan

Takashi KatoJapan Atomic Energy Agency, Japan

Yoji Koike

Tohoku University, Japan

Yasuhiro Miyake

High Energy Accelerator Research Organization, Japan

Junichiro Mizuki

Japan Atomic Energy Agency, Japan

Toshiya Ohtomo

High Energy Accelerator Research Organization, Japan

Hideki Seto

High Energy Accelerator Research Organization, Japan

Mitsuhiro Shibayama

University of Tokyo, JapanJun Sugiyama

Toyota Central R&D Labs., Inc., Japan

Eiko Torikai

University of Yamanashi, Japan

Kazuyoshi Yamada

Tohoku University, Japan

9) Nuclear and Particle Physics Experiments at the J-PARC 50GeV Proton Synchrotron Advisory Committee
Ikaros I. Bigi

University of Notre Dame, USA

Avraham Gal

The Hebrew University of Jerusalem, Israel

Tadafumi Kishimoto

Osaka University, Japan

Konrad Kleinknecht

Mainz University, Germany

Shunzo KumanoHigh Energy Accelerator Research Organization, Japan

Toshinori Mori

University of Tokyo, Japan

Tomofumi Nagae

Kyoto University, Japan

Yasuki Nagai

Osaka University, Japan

Satoshi Nakamura

Tohoku University, Japan

Matthias Gross Perdekamp

University of Illinois, USA

Michael Shaevitz

Colunbia University, USA

Susumu Shimoura

University of Tokyo, Japan

Katsuo Tokushuku

High Energy Accelerator Research Organization, Japan

Robert S. Tschirhart

Fermi National Accelerator Laboratory, USA

Hitoshi Yamamoto

Tohoku University, Japan

Main Parameters

Main Parameters

J-PARC Annual Report 201166
Present main parameters of Accelerator
Linac
Acclerated . Particles
EnergyPeak Current
Pulse Width
Repetition Rate
Freq. of RFX, DTL, and SDTL

Negative hydrogen
181 MeV
15 mA
0.5 ms
25 Hz
324 MHzRCS

Circumference
Injection Energy
Extraction Energy
Repetition Rate
RF Frequency
Harmonic Number
Number of RF cavities
Number of Bending Magnet

348.333 m
181 MeV
3 GeV
25 Hz
0.938 MHz → 1.67 MHz2
1124
Main Ring

Circumference
Injection Energy
Extraction Energy
Repetition Rate
RF Frequency
Harmonic Number
Number of RF cavities
Number of Bending Magnet

1567.5 m
3 GeV
30 GeV~0.3 Hz1.67 MHz → 1.72 MHz
9696

Key parameters of Materials and Life Science Experimental Facility
Injection energy

3 GeV

Repetition rate

25 Hz
Neutron source

Target material
Number of moderators
Moderator material
Moderator temperature/pressure
Number of neutron beam ports

Mercury
3
Supercritical hydrogen
20 K / 1.5 MPa
23

Muon production target
Target material
Number of muon beam extraction ports

Graphite4

Neutron instruments*
Open for user program (general use)
Under commissioning/construction

11
5/3

Muon instruments*
Open for user program (general use)(* as of March, 2012)2

Events

Events

J-PARC Annual Report 201168

Events◦ The Media Briefing on the Damage of The Great East Japan Earthquake (April 28)
J-PARC Center held a media briefing on the damages from the earthquake on April 28. Fifteen news media companies and23 people attended the meeting. They were shown the pictures of the disaster and guided to some of the scenes in J-PARC site.

Site tour in J-PARC by media◦ Visitations of Diet Members
A number of Diet members visited J-PARC in May to inspect the damages from the earthquake.
House of Representatives member Hiroshi Kawauchi (the Democratic
Party of Japan) and 5 Diet members visited J-PARC on May 5.
House of Representatives member Mamoru Takano (the Democratic
Party of Japan) and 2 Diet members visited J-PARC on May 6.
House of Representatives member Hiroshi Kajiyama (the Liberal Democratic Party of Japan) visited J-PARC on May 13.

Hiroshi Kajiyama (right)◦ MEXT Minister Takagi Visited J-PARC on June 23.
Yoshiaki Takagi, the Minister of Education, Culture, Sport,
Science and Technology visited J-PARC on June 23. After he received a briefing of an overview of J-PARC by Shoji Nagamiya,
the Director of J-PARC Center, he inspected the worst damaged areas in J-PARC site, the road in front of LINAC building
and outside facilities around the 3-GeV synchrotron building.

Minister Takagi (middle)

J-PARC Annual Report 2011

Events69◦ The Participants of Japan Physics Olympiad (JPhO) Visited J-PARC (August 2).
One hundred high school students who attended JPhO
visited J-PARC. After a briefing of an overview of J-PARC by
Shoji Nagamiya, the Director of J-PARC Center, they wereshown the Materials and Life Science Experimental Facility.
They enjoyed a dinner party very much with researchers overscientific topics and research experience.

Site tour in J-PARC◦ The 4th ACFA-HPPA Mini-workshop (October 5-6)
The 4th International ACFA-HPPA Mini-workshop was held for two days from October 5th at the Ibaraki Quantum BeamResearch Center (IQBRC) in Tokai Village. The workshop was hosted by J-PARC Center and experts in accelerator gathered fromJapan, Korea and China. The main subjects were the beam commissioning of the J-PARC accelerator, the status and future plan of
PEFP in Korea and the status of the CSNS project in China. Those presentations were followed by a number of questions and lively
discussions. The next workshop was scheduled in two years in Korea.

◦ MEXT Minister Nakagawa Visited J-PARC on October 22.
Masaharu Nakagawa, the Minister of Education, Culture, Sport, Science and Technology visited J-PARC on October 22. He inspected thestatus of facilities and the recovery efforts from the damages of theearthquake.

Masaharu Nakagawa (Left)

Events

J-PARC Annual Report 201170

◦ The 1st Asia-Oceania Conference on Neutron Scattering (1st AOCNS) (November 20-24)
The 1st AOCNS was held at the Tsukuba International Congress Center (EPOCHAL TSUKUBA) from November 20 to 24. The
AOCNS was organized by the Japanese Society for Neutron Science (JSNS) and the Asia-Oceania Neutron Scattering Association(AONSA). About 550 researchers mainly from Asia and Oceania area joined the conference. One hundred ten oral presentations
and more than 400 poster presentations were provided on the fruits of neutron scattering experiments. Around 150 participants
visited the Materials and Life Science Experimental Facility and the Hadron Experimental Facility of J-PARC on November 24.

◦ The 3rd MLF Symposium (January19-20)
The 3rd MLF Symposium was held at the Ibaraki
Quantum Beam Research Center (IQBRC) in Tokai Village
from January 19 to 20 and about 160 participants attended. The symposium opened with the report on thedisaster of MLF on March 11 and the recovery from thedamages. The current topics in user programs and theprogress of the experimental instruments were presented
in the main sessions. At the end the users in overseas facilities talked about well-prepared laboratories to support
users’ experiments, which the MLF staff bore in mind asstrong demands to MLF.

J-PARC Annual Report 2011

Events71◦ TX Technology Showcase in TUKUBA 2012 (January 13)
The science exhibition was held on January 13 at the Tsukuba
International Congress Center (EPOCHAL TSUKUBA), organizedby Science Academy of Tsukuba at the Science and Technology
Promotion Foundation of Ibaraki. The J-PARC booth was set up in
the projects exhibition area and the outline of facility and scientifictopics were introduced to visitors.

The J-PARC booth of the science exhibition◦ The 1st International School for Strangeness Nuclear Physics (SNP School) 2012 (Feb. 12-18)
The 1st SNP School was held from February 12 to 18. It was co-hosted by Tohoku University and JAEA Advanced Science Research Center and supported by J-PARC and other institutes. Sixty three young researches and graduate students who had great
ambition to study nuclear physics and particle physics attended from 17 nations. The researchers on the frontiers of this field delivered lectures and the participants reported their studies. The school was filled with fruitful discussions and exchanges of views.
They visited the Materials and Life Science Experimental Facility, the Hadron Experimental Facility, the Neutrino Experimental
Facility and the Central Control Room of J-PARC and keenly listened to the explanations from researchers at work.

Lecture at a conference room.

◦ The Celebration of the Resuming User Programs at Ibaraki Quantum Beam ResearchCenter (IQBRC) (February 27)
The facility has been restored from the damages of the earthquake. The Materials and Life Science Experimental Facility and
the Neutrino Experimental Facility resumed their operations for user programs on January 24. The J-PARC recovery project wascompleted on January 31 when the Hadron Experimental Facility were back in operation. In commemoration of the resumption
after the earthquake, the ceremony was held at IQBRC on February 27. Daisuke Yoshida, the chief of Research Promotion Bureau
of MEXT, Masaru Hashimoto, the governor of Ibaraki Prefecture, Tatsuya
Murakami, the headman of Tokai Village, were invited as guests. Atsuyuki
Suzuki, the president of JAEA, Atsuto Suzuki, the director general of KEK,
Yasuhiko Fujii, the director of Comprehensive Research Organization for
Science and Society (CROSS) in Tokai, the members of the J-PARC International Advisory Committee and J-PARC staff attended the ceremony.

Shoji Nagamiya, Director of J-PARC Center.

Events

J-PARC Annual Report 201172

◦ The members of the Assessment Working Group Visited J-PARC (May 8)
The Assessment Working Group for High-Intensity Proton Accelerator Facility was set under the Council for Science and Technology at the Ministry of Education, Culture, Sport, Science and Technology (MEXT) and evaluated J-PARC in terms of its functions
and contributions as a user facility. The chairperson of the working group, Hidetoshi Fukuyama (Vice President of Tokyo Universityof Science), and its members visited J-PARC and the status and operation were explained to them at each facility.

2nd from right: Hidetoshi Fukuyama (the chairman of the committee)◦ Foreign Visitors (2011)
Many visitations from overseas countries

Andrew Taylor, the former Director of ISIS, on May 24.

Dr. Bill Brinkman, the Director of Office of Science at U.S.
Department of Energy, on June 17.

Ambassador of IAEA on October 12.

J-PARC Annual Report 2011

Events73

Officials of TRIUMF (TRI-University Meson Factory) on
November 8.

Changming Zhang, the Vice President of China Atomic
Scientific Research Institution, on April 9.

Kozlov Yuri, the Director of Fundamental Research at the
Ministry of Education and Science of Russia, on April 13.

Youngah Park, member of the National Assembly of the
Republic of Korea, on May 8.

L.K. Len, the Program Manager of U.S. Department ofEnergy, on April 19.

Events

J-PARC Annual Report 201174

◦ Visitors to J-PARC in Japanese fiscal Year (JFY) 2011
In JFY2011, 2,725 people visited J-PARC.
The number of visitors dropped 60% compared to last year by effect of the earthquake on March, 11.

Public Offices
5％

Junior-high/High school
students, teachers
Business

1％

6％

9％
20％

Local residents
15％

Media
University students, experts

10％

1％

VIP, lawmakers
Foreigners

33％

ln-house

Breakdown of J-PARC visitors in JFY 2010.

Dates for Committees
1) Steering Committee
April 20th, 2010 at Ibaraki Quantum Beam Research Center, Tokai, Ibaraki
July 29th, 2010 at Tokai Campus, KEK
December 21st, 2010 at Tokai Campus, KEK
2) International Advisory Committee
February 21st and 22nd, 2011 at Ibaraki Quantum Beam Research Center, Tokai, Ibaraki
3) Users Consultative Committee for J-PARC
April 2nd, 2010 at Center for Computational Science & e-Systems, (Ueno), JAEA
October 6th, 2010 at Tokyo Office, JAEA
February 16th, 2011 at Tokyo Office, JAEA
4) Accelerator Technical Advisory Committee
February 17th - 19th, 2011 at Ibaraki Quantum Beam Research Center, Tokai, Ibaraki
5) Neutron International Advisory Committee
February 28th - March 2nd, 2011 at Ibaraki Quantum Beam Research Center, Tokai, Ibaraki6) Muon Science Advisory Committee
February 18th and 19th, 2011 at Ibaraki Quantum Beam Research Center, Tokai, Ibaraki
7) Radiation Safety Committee
9th Committee : May 27th, 2010 at Nuclear Science Research Institute, JAEA, Tokai, Ibaraki
10th committee : December 7th, 2010 at Nuclear Science Research Institute, JAEA, Tokai, Ibaraki
8) MLF Advisory Borad
9th Board : August 12th, 2010 at Tokyo Office, JAEA
10th Board : March 11th, 2011 at Tokyo Office, JAEA
9) Nuclear and Particle Physics Experiments at the J-PARC 50 GeV Proton Synchrotron Program Advisory Committee
10th Committee : July 16th - 18th, 2010 at Tokai & Tsukuba campus, KEK
11th Committee : January 14th - 16th, 2011 at Tsukuba campus, KEKPublications

Publications

J-PARC Annual Report 201176

Publications in Periodical Journals
A-001
Yui, T. et al.
Photoinduced Electron Transfer between
the Anionic Porphyrins and Viologens inTitania Nanosheetsand Mono-disperse
Mesoporous Silica Hybrid Films
ACS Appl. Mater. Interfaces, Vol 3, 931 (2011)

A-010
Ninomiya, K. et al.
Development of nondestructive andquantitative elemental analysis method
using calibration curve between muonic
X-ray intensity and elemental compositionin bronze
B. Chem. Soc. Jpn., Vol 85, 228 (2012)

A-002
Tanaka, I. et al.
Neutron structure analysis using the IBARAKI
biological crystal diffractometer (iBIX) at
J-PARC
Acta Cryst. D, Vol 66, 1194 (2010)

A-011
Sano, K. et al
Thermoresponsive Microtubule Hydrogelwith High Hierarchical Structure
Biomacromolecules, Vol 12, 1409 (2011)

A-003
Nakayama, K. et al.
Patternable Solution-Crystallized Organic
Transistors with High Charge Carrier Mobility
Adv. Mater., Vol 23, 1575 (2011)

A-012
Sano, K. et al
Self-Reparing Filamentous Actin Hydrogelwith Hierarchical Structure
Biomacromolecules, Vol 12, 4173 (2011)

A-004
Uno, M. et al.
High-Speed Flexible Organic Field-EffectTransistors with a 3D StructureAdv. Mater., Vol 23, 3047 (2011)

A-013
Masayasu, T. et al.
Current Status of a New Polarized Neutron
Reflectometer at the Intense Pulsed Neutron
Source of the Materials and Life Science
Experimental Facility (MLF) of J-PARC
Chinese J. Phys., Vol 50, 161 (2012)

A-005
Soeda, J. et al.
Solution-Crystallized Organic Field-EffectTransistors with Charge-Transfer Layers:
High-Mobility, Printable, Air-stable and LowThreshold-Voltage Operation in Air
Adv. Mater., Vol 23, 3309 (2011)
A-006
Soeda, J. et al.
High Electron Mobility in Air for N,N’1H,1H-Perfluorobutyldicyanoperylene
Carboxydiimide Solution-Crystallized Thinfilm Transistors on Hydrophobic Surfaces
Adv. Mater., Vol 23, 3681 (2011)
A-007
Matsui, M. et al.
The crystal structure of δ-Al(OH)3: Neutron
diffraction measurements and ab initio
calculations
Am. Mineral., Vol 96, 854 (2011)
A-008
Innis-Samson, V.-A. et al.
X-ray Reflection Tomography: A New Tool
for Surface Imaging
Anal. Chem., Vol 83, 7600 (2011)
A-009
Nakamura, M. et al.
A Possibility of Dynamical Study on Solid
State Ionic Materials by Inelastic Neutron
Scattering
Atom Indonesia, Vol 36, 116 (2010)

A-014
Kundu, S. et al.
Zwitterionic lipid (DPPC)-protein (BSA)
complexes at the air-water interface
Colloid. Surface. B, Vol 93, 215 (2012)
A-015
Kimura, N. et al.
Development of a variable quench pressure
relief valve for superconducting magnet
systemCryogenics, Vol 51, 465 (2011)
A-016
Tatsumoto, H. et al.
Design of a high power heater for the
cryogenic hydrogen system at J-PARC
Cryogenics, Vol.51, 315 (2011)
A-017
Kawai, M. et al.
Measurements of strain-rate distributions
on material after SHPB impact
Engineering Transaction, Vol 59, 1 (2011)
A-018
Yamada, N.L. et al.
Design and Performance of Horizontal Type
Neutron Reflectometer SOFIA at J-PARC/
MLF
Euro. Phys. J. Plus, Vol.126 108 (2011).
A-019
Katayama, N. et al.
Conductivity and incommensurate

antiferromagnetism of Fe1.02Se0.10Te0.90 underpressure
Europhysics Letters, Vol 98, 37002 (2012)
A-020
Futakawa, M. et al.
Dynamic responses of a solid wall in contact
with a bubbly liquid excited by thermal
shock loading
Exp. Therm. Fluid Sci., Vol.35, 1177 (2011)
A-021
Shigematsu, H. et al.
Structures and Phase Transitions in
Rb2MoO4 and Rb2WO4
Ferroelecrrics, Vol 414, 195 (2011)
A-022
Torikai, N. et al.
Structural analysis on a block copolymer thinfilm by in-situ neutron and X-ray grazingincidence scattering techniques
Hamon, Vol 21, 091 (2011)
A-023
Kira, H.
Development of an on-beam SEOP polarized
3He neutron spin filter
Hamon, Vol 21, 146 (2011)
A-024
Ikeda, Y.
Development of J-PARC high intensity
pulsed neutron source; Several criticaldecisions
Hamon, Vol 21, 152 (2011)
A-025
Shinohara, T. et al.
Magnetic Field Imaging by Polarized
Neutrons
Hamon, Vol 21, 180 (2011)
A-026
Fujii, Y.
J-PARC Designated as the "Specific
Advanced Neutron Beam Facility"
Hamon, Vol 21, 184 (2011)
A-027
Fujii, Y.
こんにちは、AONSA です
Hamon, Vol 21, 192 (2011)
A-028
Ito, S. e al.
Antiferromagnetic Fractons in Percolating
Magnets
Hamon, Vol 21, 234 (2011)
A-029
Seto, H. et al.
Neutron Spin Echo Spectrometers at the
Pulsed Neutron Source

J-PARC Annual Report 2011

Publications

77
Hamon, Vol 21, 239 (2011)
A-030
Tominaga, T. et al.
The 4th AONSA Neutron School 2011 Report
Hamon, Vol 22, 098 (2012)
A-031
Sano-Furukawa, A.
Neutron Diffraction Study on Hydrogen
Bond in Mineral in the Deep Earth
Hamon, Vol 22, 162 (2012)

A-040
Naruki, M.
HADRON PHYSICS AT J-PARC - CURRENTSTATUS AND FUTURE PROSPECTS
Int. J. Mod. Phys. A, Vol 26, 533 (2011)
A-041
Hiraiwa, T. et al.
THE SEARCH FOR DEEPLY BOUND KAONICNUCLEAR STATES AT J-PARC
Int. J. Mod. Phys. A, Vol 26, 561 (2011)

A-032
Arai, M.
Recovery from the Earthquake at MLF
Hamon, Vol 22, 216 (2012)

A-042
Wuenschek, B.K. et al.
STATUS AND PLANS OF EXPERIMENT E17 AT
J-PARC
Int. J. Mod. Phys. A, Vol 26, 604 (2011)

A-033
Nakamoto, T. et al.
Status of Superconducting Magnet System
for the J-PARC Neutrino Beam LineIEEE T. Appl. Supercon., Vol 21, 1700 (2011)

A-043
Su, Y. et al.
Hydrogen Behavior in an Ultrafine-GrainedElectrodeposited Pure Iron
ISIJ Int., Vol 51, 1534 (2011)

A-034
Makida, Y. et al.
Conceptual Design of a Superconducting
Solenoid System for the Super Omega Muon
Beam Line at J-PARC
IEEE T. Appl. Supercon., Vol 21, 1725 (2011)

A-044
Oba, Y. et al.
Quantitative Analysis of Precipitate in
Vanadium-microalloyed Medium Carbon
Steels Using Small-angle X-ray and Neutron
Scattering Methods
ISIJ Int., Vol 51, 1852 (2011)

A-035
Adachi, T. et al.
Quench Protection of Curved Solenoids forHigh Intensity Muon Beamlines
IEEE T. Appl. Supercon., Vol 21, 1734 (2011)
A-036
Sasaki, K. et al.
Study on Field Measurement and Ground
Vibration for Superconducting Solenoid of
New g-2 Experiment at J-PARC
IEEE T. Appl. Supercon., Vol 21, 1748 (2011)
A-037
Hemmi, T. et al.
Neutron Diffraction Measurements ofInternal Strain in Nb3Sn Cable-In-Conduit
Conductors
IEEE Trans. Appl. Supercond., Vol 21, 2028 (2011)
A-038
Osamura, K. et al.
Unusual Internal Strain Behavior Exerted on
YBCO Layer in the Surround Cu Stabilized
YBCO Coated Conductor
IEEE Trans. Appl. Supercond., Vol 21, 3090
(2011)
A-039
Morooka, S. et al.
In-situ Neutron Diffraction Study on Workhardening Behavior in a Ferrite-Martensite
Dual Phase SteelInt. J. Automot. Eng., Vol 2, 361 (2011)

A-045
Oba, Y. et al.
Quantitative Analysis of Inclusions in Low
Carbon Free Cutting Steel Using Small-angle
X-ray and Neutron Scattering
ISIJ Int., Vol 52, 0457 (2012)
A-046
Iwase, H. et al.
Modernization of the small-angle neutron
scattering spectrometer SANS-U by upgrade
to a focusing SANS spectrometer
J Appl. Crystallogr., Vol 44, 558 (2011)
A-047
Iwase, H. et al.
Optimization of the thickness of a ZnS/6LiF
scintillator for a high-resolution detector
installed on a focusing small-angle neutron
scattering spectrometer (SANS-U)J Appl. Crystallogr., Vol 45, 507 (2012)
A-048
Nyuta, K. et al.
Zwitterionic heterogemini surfactants
containing ammonium and carboxylate
headgroups 2: Aggregation behavior
studied by SANS, DLS, and cryo-TEM
J Colloid Interf. Sci., Vol 370, 80 (2012)
A-049
Okuda, T. et al.
Effect of spin dilution on the magnetic
state of delafossite CuCrO2 with an S = 3/2
antiferromagnetic triangular sublattice

J Korean. Phys. Soc., Vol 80, 014711 (2011)
A-050
Itoh, S. et al.
Antiferromagnetic Fractons in Diluted
Heisenberg Systems RbMn0.4Mg0.6F3 andRb2Mn0.598Mg0.402F4
J Korean. Phys. Soc., Vol 80, 104704 (2011)
A-051
Nakajima, K. et al.
AMATERAS : A Cold-Neutron Disk Chopper
Spectrometer
J Korean. Phys. Soc., Vol 80, SB028 (2011)
A-052
Itoh, S. et al.
Anomalous spin diffusion on twodimensional percolating network in dilute
antiferromagnet Rb2Mn0.6Mg0.4F4
J Korean. Phys. Soc., Vol 81, 74704 (2012)
A-053
Itoh, S. et al.
Quantum renormalization effects in onedimensional Heisenberg antiferromagnets
J Korean. Phys. Soc., Vol 81, 84706 (2012)
A-054
Kasugai, Y. et al.
Shielding experiments under JASMIN
Collaboration at Fermilab (I) Overview of the
Research Activities
J Korean. Phys. Soc., Vol. 59, 2063 (2011)
A-055
Jina, X. et al.
Observation of A15 Phase Transformation in
RHQ-Nb3Al Wire by Neutron Diffraction at
High-temperature
J. Alloy. Compd., Vol 525, 124 (2012)
A-056
Shinamura, S. et al.
Linear- and Angular-Shaped
Naphthodithiophenes; Selective Synthesis,
Properties, and Application to Organic FieldEffect Transistors
J. Am. Chem. Soc., Vol 133, 5024 (2011)
A-057
Iwase, K. et al.
In situ lattice strain mapping during tensileloading using the neutron transmission anddiffraction method
J. Appl. Cryst, Vol 45, 113 (2012)
A-058
Takahashi, K. et al.
Axial and lateral lattice strain states undera tensile load in as-reacted and prebent
CuNb/Nb3Sn wires using neutron diffraction
J. Appl. Phys., Vol 111, 043908 (2012)
A-059
Takenaka, Y. et al.
Growth of gold nanorods in gelledPublications

J-PARC Annual Report 201178
surfactant solutions
J. Coll. Int. Sci., Vol 356, 111 (2011)
A-060
Yamagishi, H. et al.
Simulation program for multiwire-type
two-dimensional neutron detector withindividual readout
J. Instrum., Vol 6, (2011)
A-061
Toh, K. et al.
Improved micro-pixel detector element forneutron measurement under high pressure
J. Instrum., Vol 7, (2012)
A-062
Kiyanagi, Y.
Accurate Neutron Nucleus Reaction
Measurement Instrument(ANNRI) for
Capture Cross Section Measurements at
J-PARCJ. Korean Phys. Soc., Vol 59, 0779 (2011)
A-063
Bhang, H. et al.
The Weak Decay Widths of Λ Hypernuclei
J. Korean Phys. Soc., Vol 59, 1461 (2011)
A-064
Harada, H. et al.
Study of Neutron Capture Reactions Using
the 4-pai Ge Spectrometer
J. Korean Phys. Soc., Vol 59, 1547 (2011)
A-065
Kin, T. et al.
The “4-pi Ge Spectrometer" forMeasurements of Neutron Capture Cross
Sections by the TOF Method at the J-PARC/
MLF/ANNRI
J. Korean Phys. Soc., Vol 59, 1769 (2011)
A-066
Nakamura, S. et al.
Measurements of Neutron-capture Cross
Sections of Palladium Isotopes at the
J-PARC/MLF/ANNRI
J. Korean Phys. Soc., Vol 59, 1773 (2011)
A-067
Hori, J. et al.
Measurement of Neutron Capture Gamma
Rays from the Resonances of 91Zr and 96Zr
at the J-PARC/MLF/ANNRI
J. Korean Phys. Soc., Vol 59, 1777 (2011)
A-068
Kiyanagi, Y. et al.
The Study on Nuclear Data by Using a
High Intensity Pulsed Neutron Source forAdvanced Nuclear System' Nuclear Data
Project and the Characteristics of the
Neutron Beam Line for the Capture Cross
Section Experiments at J-PARC
J. Korean Phys. Soc., Vol 59, 1781 (2011)

A-069
Kimura, A. et al.
Measurements of Neutron-capture Cross
Sections of 244Cm and 246Cm at J-PARC/
MLF/ANNRI
J. Korean Phys. Soc., Vol 59, 1828 (2011)
A-070
Takenaka, Y. et al.
Gelation Effect on the Synthesis of Highaspect-ratio Gold Nanorods
J. Nanosci. Nanotechnol., Vol 12, 714 (2012)
A-071
Naoe, T. et al.
Quantification of fatigue crack propagationof an austenitic stainless steel in mercury
embrittlement
J. Nucl. Mater., Vol , (2011)
A-072
Naoe, T. et al.
Mitigation technologies for damage induced
by pressure waves in high-power mercury
spallation neutron sources, 3; Considerationof the effect of microbubbles on pressure
wave propagation through a water test
J. Nucl. Sci. Technol., Vol 48, 865 (2011)
A-073
Ito, T.U. et al.
Incommensurate-to-Commensurate
Magnetic Phase Transition in SmIn3
Observed by Muon Spin Relaxation
J. Phys. Soc. Jpn suppl., Vol 80, 033710 (2011)
A-074
Wakimoto, S. et al.
Degradation of Superconductivity and Spin
Fluctuations by Electron Overdoping in
LaFeAsO1-xFx
J. Phys. Soc. Jpn., Vol 79, 074715 (2010)
A-075
Miyazaki, M. et al.
Quasi-One-Dimensional Spin Dynamics ind-Electron Heavy-Fermion Metal Y1-xSc xMn2
J. Phys. Soc. Jpn., Vol 80, 063707 (2011)
A-076
Sato, M. et al.
Magnetic Excitation Spectra ofSuperconducting Ca–Fe–Pt–As System
J. Phys. Soc. Jpn., Vol 80, 093709 (2011)
A-077
Yamamoto, T. et al.
Intradimer Charge Disproportionationin Triclinic-EtMe3P[Pd(dmit)2]2 (dmit:
1,3-Dithiole-2-thione-4,5-dithiolate)
J. Phys. Soc. Jpn., Vol 80, 123709-1 (2011)
A-078
Ito, T.U. et al.
Possible Long-periodic Magnetic Structure
in SmPb3
J. Phys. Soc. Jpn., Vol 80, SA075 (2011)

A-079
Kino, K. et al.
Design of Air Scattering Chamber for the
Powder Diffractometer SPICA
J. Phys. Soc. Jpn., Vol 80, SB01 (2011)
A-080
Fukuda, T. et al.
Phonon Spectra of PrFeAsO1-y via Inelastic
X-ray Scattering
J. Phys. Soc. Jpn., Vol 80, SB015-1 (2011)
A-081
Tomiyasu, K. et al.
A spin molecule model for geometricallyfrustrated spinel ZnFe2O4
J. Phys. Soc. Jpn., Vol 80, SB024 (2011)
A-082
Kajimoto, R. et al.
The Fermi Chopper Spectrometer 4SEASONS
at J-PARC
J. Phys. Soc. Jpn., Vol 80, SB025 (2011)
A-083
Takahashi, N. et al.
Repetition Rate Multiplication: RRM, an
Advanced Measuring Method Planed for the
Backscattering Instrument, DNA at the MLF,
J-PARCJ. Phys. Soc. Jpn., Vol 80, SB07 (2011)
A-084
Torii, S. et al.
Super High Resolution Powder
Diffractometer at J-PARC
J. Phys. Soc. Jpn., Vol 80, SB20 (2011)
A-085
Nakajima, K. et al.
AMATERAS: A Cold-Neutron Disk Chopper
Spectrometer
J. Phys. Soc. Jpn., Vol 80, SB28 (2011)
A-086
Kawasaki, T. et al.
Structure of Morpholinium
Tribromoplumbate C4H8ONH2PbBr3
Studied Using Single-Cry
stal Neutron Diffraction
J. Phys. Soc. Jpn., Vol 81, (2012)
A-087
Kadono, R. et al.
Quasi-One-Dimensional Spin Dynamics in
LiV2O4: One-to-Three-Dimensional Crossover
as a Possible Origin of Heavy Fermion State
J. Phys. Soc. Jpn., Vol 81, 014709 (2012)
A-088
Kawamoto, T. et al.
Tc of 11 K Identified for the Third Polymorphof the (BEDT-TTF)2Ag(CF3)4(TCE) Organic
Superconductor
J. Phys. Soc. Jpn., Vol 81, 023705-1 (2012)

J-PARC Annual Report 2011

Publications

79
A-089
Kiyanagi, R. et al.
Structural and Magnetic Phase
Determination of (1-x)BiFeO3-xBaTiO3 Solid
Solution
J. Phys. Soc. Jpn., Vol 81, 024603-1 (2012)
A-090
Mito, T. et al.
Mechanism of Field Induced Fermi
Liquid State in Yb-Based Heavy-Fermion
Compound: X-ray Absorption Spectroscopy
and Nuclear Magnetic Resonance Studies of
YbCo2Zn20
J. Phys. Soc. Jpn., Vol 81, 033706-1 (2012)
A-091
Kamada, K. et al.
Surfactant-induced friction reduction forhydrogels in the boundary lubrication
regimeJ. Phys.; Condens. Mat., Vol 23, 284107-1 (2011)
A-092
Mukai, K. et al.
Magnetic properties of the chemicallydelithiated LixMn2O4 with 0.07≤x≤1
J. Solid State Chem., Vol 184, 1096 (2011)
A-093
Yokoyama, T. et al.
Hydrogen-bond network and pH sensitivity
in transthyretin: Neutron crystal structure ofhuman transthyretin.
J. Struct. Biol., Vol 177, 283 (2012)
A-094
Ogiwara, N., et al.
Improvement of sensitivity near atmosphericpressure in a Pirani gauge in constantcurrent mode
J. Vac. Soc. Jpn., Vol 54, 162 (2011)
A-095
Ogiwara, N.
Simulation of radial flow generated byrotating a set of screens and disks, 2
J. Vac. Soc. Jpn., Vol 54, 188 (2011)
A-096
Kinsho, M.
Status of J-PARC after the Great East Japan
Earthquake
J. Vac. Soc. Jpn., Vol 55, 1 (2012)
A-097
Takahashi, G. et al.
Development of a Neutral Beam Profile
Monitor
Jpn. J. Appl. Phys., Vol 50, 36701 (2011)
A-098
Yamazaki, Y.
Report on LINAC'10
Kasokuki, Vol. 7, 304 (2011)

A-099
Ozeki, T. et al.
Status of J-PARC after the Great East Japan
Earthquake
Kasokuki, Vol. 8, 74 (2011)
A-100
Seto, H.
Lipids, Lipid Bilayers and Vesicles as Seen by
Neutrons
Kobunshi : high polymers, Jpn., Vol 60, 804(2011)
A-101
Sumino, Y. et al.
Formation of a multi-scale aggregate
structure through spontaneous blebbing of
an interface
Langmuir, Vol 28, 2278 (2012)
A-102
Nakano, Y. et al.
Effect of Hyaluronan Solution on Dynamic
Friction of PVA Gel Sliding on Weakly
Adhesive Glass Substrate
Macromolecules, Vol 44, 8908 (2011)
A-103
Kawaguchi, D. et al.
Precise Analyses of Short-Time Relaxation at
Asymmetric Polystyrene Interface in Termsof Molecular Weight by Time-Resolved
Neutron Reflectivity Measurements
Macromolecules, Vol 44, 9424 (2011)
A-104
Ikeda, K. et al.
Data Acquisition System for High Resolution
Chopper Spectrometer (HRC) at J-PARC
Mater. Trans., Vol 52, 598 (2011)
A-105
Zhou, Y. et al.
Enhanced Electrical Conductivities ofComplex Hydrides Li2(BH4)(NH2) andLi4(BH4)(NH2)3 by Melting
Mater. Trans., Vol 52, 654 (2011)
A-106
Kamaya, N. et al.
A lithium superionic conductor
Nat. Mater., Vol 10, 682 (2011)
A-107
Foran, G. et al.
CROSS-Tokai Appointed to Run Public
Beamline User Program at J-PARC
Neutron News, Vol 23, 33 (2012)
A-108
Futakawa, M. et al.
1-MW pulsed spallation neutron source(JSNS) at J-PARC
Neutron News, Vol. 22, 15 (2011)
A-109
Arai, M.

Pulsed Neutron Sources and Facilities
Neutrons in Soft Matter, edt T.Imae et al., John
Wiley & Sons Publication
A-110
Otomo, T.
SANS Instruments at Pulsed Neutron Sources
Neutrons in Soft Matter, T. Imae, T. Kanaya, M.
Furusaka, N. Torikai, (Eds.)
A-111
Mibe, T.
Measurement of muon g-2 and EDM with anultra-cold muon beam at J-PARC
Nucl Phys. B, Vol 218, 242 (2011)
A-112
Kino, K. et al.
Measurement of energy spectra and spatial
distributions of neutron beams provided
by the ANNRI beamline for capture crosssection measurements at the J-PARC/MLF
Nucl. Instrum. Meth. A, Vol 626-627, 58 (2011)
A-113
Aoki, K. et al.
A development of HBD for the J-PARC E16
experiment
Nucl. Instrum. Meth. A, Vol 628, 300 (2011)
A-114
Itoh, S. et al.
High Resolution Chopper Spectrometer(HRC) at J-PARC
Nucl. Instrum. Meth. A, Vol 631, 90 (2011)
A-115
Nagano, M. et al.
Development of fabrication process foraspherical neutron focusing mirror using
numerically controlled local wet etchingwith low-pressure polishing
Nucl. Instrum. Meth. A, Vol 634, 112 (2011)
A-116
Taketani, K. et al.
A high S/N ratio spin flip chopper system fora pulsed neutron source
Nucl. Instrum. Meth. A, Vol 634, S134 (2011)
A-117
Abgrall, N. et al.
Time projection chambers for the T2K neardetectors
Nucl. Instrum. Meth. A, Vol 637, 25 (2011)
A-118
Tamura, F. et al.
Achievement of very low jitter extraction ofhigh power proton beams in the J-PARC RCS
Nucl. Instrum. Meth. A, Vol 647, 25 (2011)
A-119
Iikura, H. et al.
Evaluations of the new LiF-scintillator andoptional brightness enhancement films forneutron imaging

Publications

J-PARC Annual Report 201180
Nucl. Instrum. Meth. A, Vol 651, 100 (2011)
A-120
Shinohara, T. et al.
Quantitative magnetic field imaging bypolarized pulsed neutrons at J-PARC
Nucl. Instrum. Meth. A, Vol 651, 121 (2011)
A-121
Kai, T. et al.
First demonstration of neutron resonanceabsorption imaging using a high-speed
video camera in J-PARC
Nucl. Instrum. Meth. A, Vol 651, 126 (2011)
A-122
Kiyanagi, Y. et al.
Design study of the imaging beamline at
J-PARC MLF, ERNIS
Nucl. Instrum. Meth. A, Vol 651, 16 (2011)
A-123
Yano, S. et al.
Data acquisition system for high resolution
chopper spectrometer (HRC) at J-PARC
Nucl. Instrum. Meth. A, Vol 654, 421 (2011)
A-124
Itoh, S. et al.
Irradiation properties of T0 chopper
components
Nucl. Instrum. Meth. A, Vol 654, 527 (2011)
A-125
Abe, K. et al.
The T2K experiment
Nucl. Instrum. Meth. A, Vol 659, 106 (2011)
A-126
Ooi, M. et al.
Experimental studies of the effect of
the ortho/para ratio on the neutronic
performance of a liquid hydrogenmoderator for a pulsed neutron source
Nucl. Instrum. Meth. A, Vol 659, 61 (2011)displacement sensor for vane-tip machiningof RFQs
Nucl. Instrum. Meth. A, Vol 667, 5 (2012)
A-131
Nomura, M. et al.
A convenient way to find an electricalinsulation break of MA cores in J-PARC
synchrotrons
Nucl. Instrum. Meth. A, Vol 668, 83 (2012)
A-132
Itoh, S. et al.
Large area window on vacuum chamber
surface for neutron scattering instruments
Nucl. Instrum. Meth. A, Vol 670, 1 (2012)
A-133
Ohshita, H. et al.
Stability of neutron beam monitor for HighIntensity Total Diffractometer at J-PARC
Nucl. Instrum. Meth. A, Vol 672, 75 (2011)
A-134
Ohoyama, K. et al.
Development of a non-adiabatic two-coilspin flipper for a polarised thermal neutron
diffractometer with a 3He spin filter
Nucl. Instrum. Meth. A, Vol 680, 75 (2012)
A-135
Sato, S.
J-PARC Facilities and Physics
Nucl. Instrum. Meth. A, Vol 862, 238 (2011)
A-136
Lim, G.Y.
Kaon experiments at J-PARC
Nucl. Phys. B, Vol 210, 210 (2011)
A-137
Kobayashi, T.
Future Neutrino Physics Scenarios in Japan
Nucl. Phys. B, Vol 217, 205 (2011)

A-127
Itoh, S. et al.
Fermi chopper developed at KEK
Nucl. Instrum. Meth. A, Vol 661, 58 (2012)

A-138
Kurup, A.
The COherent Muon to Electron Transition(COMET) experiment
Nucl. Phys. B, Vol 218, 38 (2011)

A-128
Itoh, S. et al.
T0 chopper developed at KEK
Nucl. Instrum. Meth. A, Vol 661, 86 (2012)

A-139
Nakadaira, T. et al.
T2K and beyond
Nucl. Phys. B, Vol 221, 206 (2011)

A-129
Shiomi, K. et al.
Measurement of K0L source flux at the
J-PARC neutral-kaon beam line L flux at the
J-PARC neutral-kaon beam line
Nucl. Instrum. Meth. A, Vol 664, 264 (2012)

A-140
Iizuka, R. et al.
Pressure responses of portlandite and H-D
isotope effects on pressure-induced phasetransitions
Phys. Chem. Miner., Vol 38, 777 (2011)

A-130
Kondo, Y. et al.
On-machine non-contact dimensionmeasurement system with laser

A-141
Sano-Furukawa, A. et al.
Compression behaviors of distorted rutiletype hydrous phases, MOOH (M=Ga, In, Cr)

and CrOOD
Phys. Chem. Miner., Vol 39, 375 (2012)
A-142
Sano-Furukawa, A. et al.
Investigation of hydrogen sites of
wadsleyite: A neutron diffraction study
Phys. Earth Planet. In., Vol 189, 56 (2011)
A-143
Kamazawa, K. et al.
Interrelationship between Li+ diffusion,
charge, and magnetism in 7LiMn2O4 and
7
Li1.1Mn1.9O4 spinels: Elastic, inelastic, andquasielastic neutron scattering
Phys. Rev. B, Vol 83, 094401 (2011)
A-144
Shu, L. et al.
Suppression of time-reversal symmetry
breaking superconductivity inPr(Os1-xRux)4Sb12 and Pr1-yLayOs4Sb12
Phys. Rev. B, Vol 83, 100504 (2011)
A-145
Tanabe, Y. et al.
Similarity between Ni and Zn Impurity
Effects on the Superconductivity and CuSpin Correlation in La2-xSr xCu1-yNiyO4 High-Tc
Cuprates: A Comparison Based on the Hole
Trapping by Ni
Phys. Rev. B, Vol 83, 144521 (2011)
A-146
Okabe, H. et al.
Ba2IrO4: A spin-orbit Mott insulating quasitwo-dimensional antiferromagnet
Phys. Rev. B, Vol 83, 155118 (2011)
A-147
Adachi, T. et al.
Development of Cu-Spin Correlationin the Bi1.74Pb0.38Sr1.88Cu1-yZnyO6+δ HighTemperature Superconductors Observed by
Muon Spin Relaxation
Phys. Rev. B, Vol 83, 184522 (2011)
A-148
Ishii, K. et al.
Polarization-analyzed resonant inelastic
x-ray scattering of the orbital excitations in
KCuF3
Phys. Rev. B, Vol 83, 241101 (2011)
A-149
Nishi, I. et al.
Angle-resolved photoemission
spectroscopy study of PrFeAsO0.7:
Comparison with LaFePO
Phys. Rev. B, Vol 84, 014504 (2011)
A-150
Matsubayashi, K. et al.
Pressure-induced changes in the magnetic
and valence state of EuFe2As2
Phys. Rev. B, Vol 84, 024502-1 (2011)

J-PARC Annual Report 2011

Publications

81
A-151
Ofer, O. et al.
Frustration and magnetism of the zigzag
chain compounds EuL2O4 (L = Yb, Lu, Gd, Eu)
Phys. Rev. B, Vol 84, 054428 (2011)

A-161
Sugiyama, J. et al.
Diffusive behavior in LiMPO4 with M=Fe, Co,
Ni probed by muon-spin relaxation
Phys. Rev. B, Vol 85, 054111 (2012)

A-171
Inoue, R. et al.
Interfacial properties of polystyrene thinfilms as revealed by neutron reflectivity
Phys. Rev. E, Vol 84, 031802 (2011)

A-152
Sugiyama, J. et al.
Magnetic and diffusive nature of LiFePO4
investigated by muon spin rotation andrelaxation
Phys. Rev. B, Vol 84, 054430 (2011)

A-162
Hirata, Y. et al.
Correlation between the interlayer
Josephson coupling strength and anenhanced superconducting transition
temperature of multilayer cuprate
superconductors
Phys. Rev. B, Vol 85, 054501 (2012)

A-172
Toriyama, T. et al.
Peierls Mechanism of the Metal-Insulator
Transition in Ferromagnetic Hollandite
K 2Cr8O16
Phys. Rev. Lett., Vol 107, 266402-1 (2011)

A-153
Iida, K. et al.
Inelastic neutron scattering study of themagnetic fluctuations in Sr2RuO4
Phys. Rev. B, Vol 84, 060402 (2011)
A-154
Fukuda, T. et al.
Soft and Isotropic Phonons in PrFeAsO1-y
Phys. Rev. B, Vol 84, 064504 (2011)
A-155
Kobayashi, W. et al.
Anisotropic thermoelectric properties
associated with dimensional crossover inquasi-one-dimensional SrNbO3.4+d (d-0.03)
Phys. Rev. B, Vol 84, 085118-1 (2011)
A-156
Gretarsson, H. et al.
Revealing the dual nature of magnetism iniron pnictides and iron chalcogenides using
x-ray emission spectroscopy
Phys. Rev. B, Vol 84, 100509 (R) (2011)
A-157
Fukuta, R et al.
Effect of cation-size variation on spin andorbital orders in Eu1-x(La0.254Y0.746)xVO3
Phys. Rev. B, Vol 84, 140409 (2011)
A-158
Ishikado, M. et al.
s±-like spin resonance in the iron-based
nodal superconductor BaFe2(As0.65P0.35)2
observed using inelastic neutron scattering
Phys. Rev. B, Vol 84, 144517 (2011)
A-159
Sugiyama, J. et al.
Successive magnetic transitions and static
magnetic order in RCoAsO (R=La, Ce, Pr, Nd,
Sm, Gd) confirmed by muon-spin rotation
and relaxation
Phys. Rev. B, Vol 84, 184421 (2011)
A-160
Murai, N. et al.
Effect of out-of-plane disorder onsuperconducting gap anisotropy inBi2+xSr2−x CaCu2O8+δ as seen via Raman
spectroscopy
Phys. Rev. B, Vol 85, 020507 (R) (2012)

A-163
Nambu, Y. et al.
Block magnetism coupled with local
distortion in the iron-based spin-laddercompound BaFe2Se3
Phys. Rev. B, Vol 85, 064413-1 (2012)
A-164
Ishii, K. et al.
Electronic excitations around the substituted
atom in La2Cu1-yNiyO4 as seen via resonant
inelastic x-ray scattering
Phys. Rev. B, Vol 85, 104509 (2011)
A-165
Ohwada, K. et al.
Two-dimensional charge fluctuation inb-Na0.33V2O5
Phys. Rev. B, Vol 85, 134102-1 (2012)
A-166
Dissanayake, S.E. et al.
Magnetic-field-induced instability of thecooperative paramagnetic state in ZnxCo4−
x(OD)6Cl2
Phys. Rev. B, Vol 85, 174435 (2012)
A-167
Matsumiya, H. et al.
Level structure and production cross sectionof 12Ξ Be studied with coupled-channels
antisymmetrized molecular dynamics
Phys. Rev. C, Vol 83, 24312 (2011)
A-168
Isaka, M. et al.
Deformation of hypernuclei studied with
antisymmetrized molecular dynamics
Phys. Rev. C, Vol 83, 44323 (2011)
A-169
Isaka, M. et al.
Shell and cluster states of 21ΛNe studied
with antisymmetrized molecular dynamics
Phys. Rev. C, Vol 83, 54304 (2011)
A-170
Abe, K. et al.
First muon-neutrino disappearance study
with an off-axis beam
Phys. Rev. D, Vol 85, 31103 (2012)

A-173
Abe, K. et al.
Indication of Electron Neutrino Appearance
from an Accelerator-Produced Off-Axis
Muon Neutrino Beam
Phys. Rev. Lett., Vol 107, 41801 (2011)
A-174
Jeong, J. et al.
Spin wave measurements over full Brillouinzone of multiferroic BiFeO3
Phys. Rev. Lett., Vol 108, 077202 (2012)
A-175
Machida, A. et al.
Formation of NaCl-Type Monodeuteride
LaD by the Disproponationation Reaction of
LaD_3
Phys. Rev. Lett., Vol 108, 205501 (2012)
A-176
Tamura, F. et al.
Multiharmonic rf feedforward system forbeam loading compensation in wide-band
cavities of a rapid cycling synchrotron
Phys. Rev. ST Accel. Beams, Vol 14, 051004(2012)A-177
Ao, H. et al.
First high-power model of the annularring coupled structure for use in the Japan
Proton Accelerator Research Complex linac
Phys. Rev. ST Accel. Beams, Vol 15, 011001(2012)
A-178
Ino, T. et al.
Measurement of the neutron beampolarization of BL05/NOP beamline at
J-PARC
Physica B, Vol 406, 2424 (2011)
A-179
Kira, H. et al.
Development and test of SEOP neutron spin
filter in Japan
Physica B, Vol 406, 2433 (2011)
A-180
Arimoto, Y. et al.
External cavity design of high-power diodelaser for polarized helium-3 neutron spin
filters based on spin-exchange opticalPublications

J-PARC Annual Report 201182
pumping
Physica B, Vol 406, 2439 (2011)
A-181
Sakaguchi, Y. et al.
Research on glass cells for 3He neutron spin
filters
Physica B, Vol 406, 2443 (2011)
A-182
Shamoto, S. et al.
Neutron scattering of iron-based
superconductors
Physica C, Vol 471, 639 (2011)
A-183
Ishikado, M. et al.
Inelastic neutron scattering on iron-based
superconductor BaFe2(As,P)2
Physica C, Vol 471, 643 (2011)
A-184
Kanaya, T. et al.
Structure and dynamics of poly(vinyl
alcohol) gels in mixtures of dimethyl
sulfoxide and water
Polymer J., Vol 44, 83 (2012)
A-185
Kasugai, Y. et al.
Gamma dose measurements andspectroscopy analysis for spallation
products in JSNS mercury circulation system
Prog. Nucl. Sci. Tech., Vol. 1, 501 (2011) (Fifth
Int. Symp. on Radiation Safety and Detection
Technology, ISORD-5)
A-186
Morii, Y. et al.
Finishing a Series of Lectures on Neutron
Diffraction
RADIOISOTOPES, Vol 60, 151 (2011)

A-190
Nakatani, K. et al.
Collaboration between J-PARC andComputing Science
RIST NEWS, Vol 49, 20 (2010)
A-191
Sumino, Y. et al.
Dynamical blebbing at a droplet interface
driven by instability in elastic stress: a novel
self-motile system
Soft Matter, Vol 7, 3204 (2011)
A-192
Liu, H.J. et al.
Surface and interface porosity of polymer/
fullerene-derivative thin films revealedby contrast variation of neutron and X-ray
reflectivity
Soft Matter, Vol 7, 9276 (2011)
A-193
Sato, M. et al.
On the superconducting pairing mechanismof Fe-based systems -Is it new or wellknown?Solid State Commun. Special Issue on Iron
pnictides, Vol 152, 688 (2012)
A-194
Jin, X. et al.
Residual strain dependence on the matrix
structure in RHQ-Nb3Al wires by neutron
diffraction measurement
Supercond. Sci. Tech., Vol 25, 065021 (2012)
A-195
Matuo, H. et al.
Ferroelectric Properties and Domain
Structures of (Bi0.5K0.5)TiO3-BiFeO3
ceramics
T. MRS Jap., Vol 36, 285 (2011)

A-187
Suzuya, K.
Structure analysis of liquids and disorderedmaterials using pulsed neutron diffraction
and total scatteirng
RADIOISOTOPES, Vol 60, 63 (2011)

A-196
Fujii, Y.
［西川賞］受賞論文：中性子・放射光による構造物性研究、および結晶学の発展へ
の貢献

A-188
Tanaka, I. et al.
Fundamentals and applications of neutron
diffraction (applications 28) Structural studyof hydrogen and hydration by the Ibaraki
Biological Crystal Diffractometer (iBIX)/
industrial use
RADIOISOTOPES, Vol 60, 89 (2011)

A-197
Fujii, Y.
中性子利用の新時代

A-189
Yokoo, T. et al.
Examination of gas desorption by B4C resinfor use in neutron scattering experimentRev. Sci. Instrum, Vol 82, 95109 (2011)

日本結晶学会誌

表面科学

A-198
Otomo, T.
高エネルギー加速器研究機構と中性子全散乱装置
触媒技術の動向と展望 2011

J-PARC Annual Report 2011

Publications

83

Conference Reports and Books
C-001
Hirai, M. et al.
Recent progress on nuclear parton
distribution functions
AIP Conf. Proc., Vol 1369, 88 (2011)
C-002
Miyake, Y. et al.
Strongest Pulsed Muon Source at J-PARCMUSE
AIP Conf. Proc., Vol 1382, 217 (2011)
C-003
Ikedo, Y. et al.
The Status of the Superomega Muon
Beamline
AIP Conf. Proc., Vol 1382, 220 (2011)
C-004
Naruki, M.
Status Report of J-PARC E19
AIP Conf. Proc., Vol 1388, 412 (2011)
C-005
Dote, A. et al.
Application of coupled-channel Complex
Scaling Method to Λ(1405)
AIP Conf. Proc., Vol 1388, 589 (2011)
C-006
Ishida, K. et al.
Low emittance, slow muon source for newg‐2 experiment
AIP Conf. Proc., Vol. 1382, 223 (2011)
C-007
Shimomura, K.
Possibility of precise measurements ofmuonium HFS at J‐PARC MUSE
AIP Conf. Proc., Vol. 1382, 245 (2011)
C-008
Kobayashi, T. et al.
Features of the J-PARC linac
AIP Conf. Proc., Vol.1336, 029 (2011)

Precision spectroscopy of kaonic 3He X‐rays
at J‐PARCAIP Conf. Proc., Vol.1374, 216 (2011)
C-013
Paolone, V. et al.
T2K: ND280 Status, Progress, and Plans
AIP Conf. Proc., Vol.1382, 182 (2011)
C-014
Takahashi, T.
J-PARC, facility for hadron physics, thepresent status and future
AIP Conf. Proc., Vol.1388, 166 (2011)
C-015
Naruki, N. et al.
Status Report of J‐PARC E19
AIP Conf. Proc., Vol.1388, 412 (2011)
C-016
Hashimoto, T. et al.
Precision Spectroscopy of Kaonic Helium-3
X-rays at J-PARC
AIP Conf. Proc., Vol.1388, 580 (2011)
C-017
Enomoto, S. et al.
Spectroscopic study of Λ(1405) via the in‐flight (K−,n) reaction on deuteron
AIP Conf. Proc., Vol.1388, 599 (2011)
C-018
Sugimura, H. et al.
Development of Silicon Strip Detector for themeasurement of the Ξ‐atom X‐rays
AIP Conf. Proc., Vol.1388, 602 (2011)
C-019
Oguri, H. et al.
Operation status of the J-PARC negativehydrogen ion source
AIP Conf. Proc., Vol.1390, 235 (2011)

C-009
Sato, S.
J‐PARC Status, Nuclear and Particle Physics
AIP Conf. Proc., Vol.1336, 560 (2011)

C-020
Ueno, A. et al.
Impedance measurement of an antenna withhydrogen plasma driven by 13.56 MHz-rf for
J-PARC H$^{-}$ ion source
AIP Conf. Proc., Vol.1390, 292 (2011)

C-010
Imai, K.
J‐PARC and its prospects of nuclear andparticle physics
AIP Conf. Proc., Vol.1342, 032 (2011)

C-021
Sada, Y. et al.
A Search for deeply‐bound Kaonic nuclear
state at the J‐PARC E15 experiment
AIP Conf. Proc., Vol.1390, 583 (2011)

C-011
Hayano, R.S.
Kaonic Atoms
AIP Conf. Proc., Vol.1374, 208 (2011)

C-022
Mizusawa, M. et al.
In-situ X-ray reflectivity measurement ofpolyvinyl acetate thin films during glasstransition
IOP Conf. Ser.: Mater. Sci. Eng., Vol 24, 012013(2011)

C-012
Sato, M. et al.

C-023
Torikai, N. et al.
Development of a Physically Bent Cylindroid
Mirror for Beam Focusing for a Pulsed
Neutron Reflectometer
IOP Conf. Ser.: Mater. Sci. Eng., Vol 24, 012016(2011)
C-024
Terayama, Y. et al.
Chain dimensions in free and immobilized
brush states of polysulfobetaine in aqueous
solution at various salt concentrations
J. Phys.; Conf. ser., Vol 272, 012010 (2011)
C-025
Mitamura, K. et al.
Advanced Neutron Reflectometer for
Investigation on Dynamic/Static Structuresof Soft-Interfaces in J-PARC
J. Phys.; Conf. ser., Vol 272, 012017 (2011)
C-026
Kobayashi, M. et al.
Characterization of Swollen States ofPolyelectrolyte Brushes in Salt Solution by
Neutron Reflectivity
J. Phys.; Conf. ser., Vol 272, 012019 (2011)
C-027
Torikai, N. et al.
Depth distribution of different solvents in aphase-separated block copolymer thin film
J. Phys.; Conf. ser., Vol 272, 012027 (2011)
C-028
Sakaguchi, Y. et al.
Structure of glasses for 3He neutron spin
filter cells
J. Phys.; Conf. ser., Vol 294, 012004 (2011)
C-029
Kira, H. et al.
Developments of In-Situ SEOP Polarized 3He
Neutron Spin Filter in Japan
J. Phys.; Conf. ser., Vol 294, 012014 (2011)
C-030
Sakaguchi, Y. et al.
Applications of 3He neutron spin filterson the small-angle neutron scattering
spectrometer SANS-J-II
J. Phys.; Conf. ser., Vol 294, 012017 (2011)
C-031
Miyake, Y. et al.
Ultra Slow Muon Microscopy for Nanoscience
J. Phys.; Conf. Ser., Vol 302, 012038 (2011)
C-032
Oka, M. et al.
Prospects of the Hadron Physics at J-PARC
J. Phys.; Conf. Ser., Vol 302, 12052 (2011)

Publications

J-PARC Annual Report 2011

84
C-033
Hasegawa, T. et al.
Introductory remark on the First International
Workshop towards the Giant Liquid Argon
Charge Imaging Experiment (GLA2010)
J. Phys.; Conf. Ser., Vol 308, 12001 (2011)
C-034
Maruyama, T. et al.
A tagged low-momentum kaon test-beam
exposure with a 250L LAr TPC (J-PARC T32)
J. Phys.; Conf. Ser., Vol 308, 12008 (2011)
C-035
Sakuma, F. et al.
Development of Thick-GEMs for a GEM-TPC
TrackerJ. Phys.; Conf. Ser., Vol 308, 12018 (2011)
C-036
Yoshioka, M. et al.
Okinoshima site study
J. Phys.; Conf. Ser., Vol 308, 12028 (2011)
C-037
Mozzucato, E. et al.
The T2K Time Projection Chambers: first yearof operation
J. Phys.; Conf. Ser., Vol 309, 12019 (2011)

Detectors for a Precision X-ray Spectroscopyof Kaonic Helium-3
J. Phys.; Conf. Ser., Vol 312, 052009 (2011)

Reverse Monte Carlo modeling of Li2S-P2S5
superionic conductors
J. Phys.; Conf. Ser., Vol 340, 012058 (2011)

C-045
Kou, H.
Beam Commissioning of K1.8BR Beamline at
J-PARC Hadron Hall
J. Phys.; Conf. Ser., Vol 312, 052012 (2011)

C-056
Shamoto, S. et al.
Dynamical Spin Susceptibility Studied by
Inelastic Neutron Scattering on LaFeAsO1-xFx
J. Phys.; Conf. Ser., Vol 340, 012075/6 (2012)

C-046
Shirotori, K. et al.
The first experiment at the J-PARC K1.8 beamline using the SKS spectrometer
J. Phys.; Conf. Ser., Vol 312, 052013 (2011)

C-057
Shimakura, H. et al.
Quasi-elastic neutron scattering of dense
molecular liquid selenium bromide
J. Phys.; Conf. Ser., Vol 340, 012080 (2012)

C-047
Takahashi, T. et al.
Commissioning of the J-PARC K1.8 beamline
and the beam spectrometer
J. Phys.; Conf. Ser., Vol 312, 052026 (2011)

C-058
Chow, K.H. et al.
µSR Investigation of the Hollandite Vanadate
K2V8O16
Physics Procedia, Vol , (2011)

C-048
Takahashi, H. et al.
Construction and beam commissioning of
Hadron Experimental Hall at J-PARC
J. Phys.; Conf. Ser., Vol 312, 052027 (2011)

C-059
Mihara, S.
Muon physics programs at J-PARC
Physics Procedia, Vol 17, 153 (2011)

C-038
Nagae, T.
Strangeness in Nuclear Physics
J. Phys.; Conf. Ser., Vol 312, 022001 (2011)

C-049
Ohira-Kawamura, S. et al.
ToF Inelastic neutron scattering studies on
quantum spin systems (CuCl)LaB2O7 (B =Nb, Ta)J. Phys.; Conf. Ser., Vol 320, 012037 (2011)

C-039
Hayano, R.S.
Kaonic Helium X-rays
J. Phys.; Conf. Ser., Vol 312, 022004 (2011)

C-050
Nakayoshi, K. et al.
DAQ-Middleware: Progress and status
J. Phys.; Conf. Ser., Vol 331, 022023 (2011)

C-040
Bhang, H. et al.
The three-body nonmesonic weak decay
process of 12ΛC hypernucleus and its
exclusive measurement at J-PARC (E18)
J. Phys.; Conf. Ser., Vol 312, 022009 (2011)

C-051
Sendai, H. et al.
Performance measurement of DAQMiddleware
J. Phys.; Conf. Ser., Vol 331, 022039 (2011)

C-041
Sato, M. et al.
Precision Spectroscopy of Kaonic Helium-3
X-rays at J-PARC
J. Phys.; Conf. Ser., Vol 312, 022020 (2011)
C-042
Kumano, S.
Plans for Hadronic Structure Studies at
J-PARCJ. Phys.; Conf. Ser., Vol 312, 032005 (2011)
C-043
Nagamiya, S.
Overview of hadron facilities.
J. Phys.; Conf. Ser., Vol 312, 052002 (2011)
C-044
Hashimoto, T. et al.
Performance Evaluation of Silicon DriftC-052
Ino, T. et al.
A compact SEOP 3He neutron spin filter with
AFP NMRJ. Phys.; Conf. Ser., Vol 340, 012006 (2012)
C-053
Sakai, K. et al.
Development of polarized Xe gas target forneutron experiment at J-PARC
J. Phys.; Conf. Ser., Vol 340, 012037 (2012)

C-060
Arimoto, Y. et al.
Longitudinal-gradient magnet for time
focusing of ultra-cold neutrons
Physics Procedia, Vol 17, 20 (2011)
C-061
Sugiyama, J. et al.
Lithium Diffusion in Lithium-Transition-Metal
Oxides Detected by μ+SR
Physics Procedia, Vol 30, 105 (2012)
C-062
Adiperdana, B. et al.
Muon Sites Estimation in La2CuO4 and A
New Vanadium Cluster Compound, V4S9Br4,
using Electronic and Nuclear Dipole Field
Calculations
Physics Procedia, Vol 30, 109 (2012)
C-063
Sugiyama, J. et al.
Magnetic and Diffusive Nature of LiFePO4
Physics Procedia, Vol 30, 190 (2012)
C-064
Magnus Wikberg, J. et al.
Magnetic Order and Frustrated Dynamics
in Li (Ni0.8Co0.1Mn0.1)O2: A Study by μ+SR
and SQUID Magnetometry
Physics Procedia, Vol 30, 202 (2012)

C-054
Tamura, I. et al.
Current status of a time-of-flight single
crystal neutron diffractometer SENJU at
J-PARCJ. Phys.; Conf. Ser., Vol 340, 012040 (2012)

C-065
Shimomura, K. et al.
Photo Detachment of Negatively Charged
Muonium in GaAs by Laser Irradiation
Physics Procedia, Vol 30, 224 (2012)

C-055
Onodera, Y. et al.

C-066
Yokoyama, K. et al.

Publications

J-PARC Annual Report 2009

J-PARC Annual Report 2011

Publications

85
Detection of Conduction Electron Spin
Polarization in n-GaAs by Negative Muonium
Physics Procedia, Vol 30, 231 (2012)techniques
Proc. of 19th Int. Conf. on Nuclear Engineering(ICONE-19) (CD-ROM), (2011)

C-067
Sugiyama, J. et al.
Successive Magnetic Transitions in RECoAsO
Physics Procedia, Vol 30, 262 (2012)

C-076
Takei, H. et al.
Study on the structural integrity of fuelcladdings against beam trips for acceleratordriven system
Proc. of 19th Int. Conf. on Nuclear Engineering(ICONE-19) (CD-ROM), (2011)

C-068
Miura, A. et al.
Beam Diagnostics in the J-PARC Linac for ACS
UpgradeProc. of 10th European Workshop on Beam
Diagnostics and Instrumentation for Particle
Accelerators (DIPAC2011), 050 (2011)
C-069
Tejima, M. et al.
Beam Based Gain Calibration of Beam
Position Monitors at J-PARC MR
Proc. of 10th European Workshop on Beam
Diagnostics and Instrumentation for Particle
Accelerators (DIPAC2011), 092 (2011)
C-070
Miura, A. et al.
Beam Loss Detected by Scintillation Monitor
Proc. of 10th European Workshop on Beam
Diagnostics and Instrumentation for Particle
Accelerators (DIPAC2011), 149 (2011)
C-071
Toyama, T.
Beam Instrumentation in J-PARC
Proc. of 10th European Workshop on Beam
Diagnostics and Instrumentation for Particle
Accelerators (DIPAC2011), 275 (2011)
C-072
Miyao, T. et al.
Beam Position Monitors for the ACS Sectionof the J-PARC Linac
Proc. of 10th European Workshop on Beam
Diagnostics and Instrumentation for Particle
Accelerators (DIPAC2011), 341 (2011)
C-073
Kurimoto, Y. et al.
The Bunch by Bunch Feedback System in
J-PARC Main Ring
Proc. of 10th European Workshop on Beam
Diagnostics and Instrumentation for Particle
Accelerators (DIPAC2011), 482 (2011)
C-074
Xu, P.G. et al.
Development and Prospect of Bulk Texture
Measurement Technique by Neutron
Diffraction
Proc. of 120th Spring Conf. of the Japan Inst. ofLight Metals, 289 (2011)
C-075
Obayashi, H. et al.
Design study for beam window of ADS anddevelopment of LBE flow measurement

C-077
Takei, H. et al.
Estimation of acceptable beam trip
frequencies of accelerators for ADS andcomparison with performances of existing
accelerators
Proc. of 1st Int. Workshop on Technology andComponents of Accelerator-driven Systems(TCADS-1), 231 (2011)
C-078
Hotchi, H. et al.
J-PARC BEAM COMMISSIONING PROGRESS
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 0006, (2011)
C-079
Ikegami, M.
Study on the Realignment Plan for J-PARC
Linac after the Tohoku Earthquake in Japan
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 0044, (2011)
C-080
Morita, Y. et al.
Development of a New RF Accelerating
Cavity for J-PARC Ring Accelerator
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 0098, (2011)
C-081
Nomura, M. et al.
Condition of MA Cut Cores in the RF Cavities
of J-PARC Main Ring after Several Years of
Operation
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 0107, (2011)
C-082
Shobuda, Y. et al.
Mitigation of Beam Instability due to Space
Charge Effects at 3 GeV RCS in J-PARC
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 0595, (2011)
C-083
Sato, Y. et al.
Beam Dynamics Simulations of J-PARC Main
Ring for Upgrade Plan of Fast Extraction
Operation
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 0598, (2011)
C-084
Yamamoto, M. et al.

Simulation of Longitudinal Emittance Control
in J-PARC RCS for 400 MeV Injection
Proc. of 2nd Int. Conf. Particle Accelerator
Conf. (IPAC2011), 0607, (2011)
C-085
Ogiwara, N.
Ultra High Vacuum for High Intensity Proton
Accelerators
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 0971, (2011)
C-086
Igarashi, S. et al.
Beam Profile Measurement using Flying Wire
Monitors at the J-PARC Main Ring*
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 1239, (2011)
C-087
Yoshimura, K. et al.
New Measurements of Proton Beam
Extinction at J-PARC
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 1242, (2011)
C-088
Maruta, T.
Longitudinal Beam Profile Measurement at
J-PARC Separated Drift Tube Linac
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 1245, (2011)
C-089
Sato, H. et al.
Measurement of Beam Loss Tracks by
Scintillating Fibers at J-PARC Linac
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 1251, (2011)
C-090
Hatakeyama, S.
Monitoring of the Betatron Tune andAmplitude at Multi-batch Injection of J-PARC
MR
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 1254, (2011)
C-091
Miura, A. et al.
Beam Loss Detected by Scintillation
MonitorProc. of 2nd Int. Conf. Particle
Accelerator Conf. (IPAC2011), 1257, (2011)
C-092
Yoshimoto, M.
Development of the H0 Dump Branch Ductfor the Additional Collimation System in
J-PARC RCS
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 1545, (2011)
C-093
Yamamoto, K. et al.
Foil Scattering Loss Mitigation by the
Additional Collimation System of J-PARC
RCSProc. of 2nd Int. Conf. Particle Accelerator

Publications

J-PARC Annual Report 2011

J-PARC Annual Report 2009

Publications

86
Conf. (IPAC2011), 1605, (2011)
C-094
Agari, A. et al.
Development and Construction of the Beam
Dump for J-PARC Hadron Hall
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 1608, (2011)
C-095
Shirakata, M.J. et al.
Displacement of J-PARC Caused by
Megaquake
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 1662, (2011)
C-096
Miura, A. et al.
Beam Monitor Deformation by Tohoku
Earthquake and its Recovery Project
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2328, (2011)
C-097
Yoshimoto, M. et al.
Suppression of Leakage Fields from DC
Magnets in J-PARC 3 GeV RCS
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2412, (2011)
C-098
Koseki, T.
Operation Status and Future Plan of J-PARC
Main Ring
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2499, (2011)
C-099
Yoshii, M.
Acceleration of High Intensity Proton Beams
in the J-PARC Synchrotrons
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2502, (2011)
C-100
Maruta, T.
Longitudinal Beam Acceptance of J-PARC
Drift Tube Linac
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2592, (2011)
C-101
Maruta, T.
Beamloss Study at J-PARC Linac by using
Geant4 Simulation
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2595, (2011)
C-102
Wei, G.H.
Dependence of Beam Loss on Vacuum
Pressure Level in J-PARC Linac
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2598, (2011)
C-103
Morishita, T. et al.

Floor Deformation of J-PARC Linac after the
Tohoku Earthquake in Japan
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2601, (2011)
C-104
Hasegawa, K. et al.
Status of J-PARC Accelerator Facilities after
the Great East Japan Earthquake
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2727, (2011)(IPAC2011), 3505, (2011)
C-113
Saha, P.K. et al.
Measurement of the Stripping Efficiency for
HBC Stripper Foil in the 3-GeV RCS of J-PARC
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 3511, (2011)

C-105
Hayashi, N. et al.
Injection Energy Recovery of J-PARC RCS
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2730, (2011)

C-114
Watanabe, Y. et al.
Development of Wide Dynamic Range
Power Supply with Combined PWM and PAM
Control
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), (2011)

C-106
Tamura, F. et al.
Performance of Multi-harmonic RF
Feedforward System for Beam Loading
Compensation in the J-PARC RCS
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2733, (2011)

C-115
Ohmori, C. et al.
BACK-UP SCENARIO OF J-PARC RCS CAVITY
USING FORCED AIR COOLING
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOMH05 (2011)

C-107
Ohmori, C. et al.
HIGH GRADIENT MAGNETIC ALLOY CAVITIESFOR J-PARC UPGRADE
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 2885 (2011)

C-116
Tani, N. et al.
ALIGNMENT STATUS OF J-PARC
ACCELERATOR FACILITY AFTER THE TOHOKU
EARTHQUAKE IN JAPAN
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPL04 (2011)

C-108
Watanabe, Y.
Rapid-cycling Power Supplies for the J-PARC
RCS Sextupole Magnets
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 3338, (2011)
C-109
Takayanagi, T. et al.
Upgrade Design of the Bump System in the
J-PARC 3-GeV RCS
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 3403, (2011)
C-110
Shirakata, M.J. et al.
Collimator Upgrade Plan of the J-PARC Main
Ring
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 3496, (2011)
C-111
Sugai, I. et al.
Performance Characteristics of HBC-foils by
650 KeV H− and DC High Intensity Ion Beam
Irradiation
Proc. of 2nd Int. Conf. Particle Accelerator Conf.
(IPAC2011), 3502, (2011)
C-112
Wei, G.H.
Possibility of longitudinal painting injection
with debuncher system in J-PARC linac
Proc. of 2nd Int. Conf. Particle Accelerator Conf.

C-117
Hasegawa, K.
STATUS OF J-PARC ACCELERATORS
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS003 (2011)
C-118
Shirakata, M. et al.
ALIGNMENT STATUS OF J-PARC MAIN RING
AFTER THE MEGA QUAKE
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS018 (2011)
C-119
Kato, S. et al.
OPTIMIZATION FOR THE ADDITIONALCOLLIMATION SYSTEM OF J-PARC RCS
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS019 (2011)
C-120
Hayashi, N. et al.
INJECTION ENERGY RECOVERY OF J-PARC
RCS
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS022 (2011)

Publications

J-PARC Annual Report 2009

J-PARC Annual Report 2011

Publications

87
C-121
Fan, K. et al.
DESIGN STUDY OF LUMPED INJECTION
KICKERS FOR J-PARC MAIN RING
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS023 (2011)
C-122
Yamamoto, K. et al.
FOIL SCATTERING LOSS MITIGATION BY THE
ADDITIONAL COLLIMATION SYSTEM OF
J-PARC RCS
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS025 (2011)
C-123
Maruta, T.
SIMULATION STUDY ON BEAMLOSS AT
J-PARC LINAC BY USING GEANT4
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS025 (2011)
C-124
Igarashi, S. et al.
OPTICS MEASUREMENT AND CORRECTION
IN J-PARC MR
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS028 (2011)
C-125
Agari, K. et al.
DESIGN AND DEVELOPMENT OF THE BEAM
DUMP FOR J-PARC HADRON-HALL [5]Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS029 (2011)
C-126
Minakawa, M. et al.
ELECTROSTATIC SEPARATORS AT THE J-PARC
HADRON HALL
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS030 (2011)
C-127
Schnase, A. et al.
J-PARC MR HORIZONTAL EXCITER TEST FOR
TRANSVERSAL NOISE APPLICATION
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS032 (2011)
C-128
Takano, J. et al.
DESIGN STUDY OF SKEW QUADRUPOLEMAGNGNET FOR THE J-PARC MAIN RING
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS033 (2011)
C-129
Hirose, E. et al.

RE-ALIGNMENT PLAN OF MAGNETS AT
J-PARC HADRON FACILITY AFTER THE
HIGASHI-NIHON EARTHQUAKE
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS038 (2011)
C-130
Fujimori, H. et al.
KICKER SYSTEM FOR THE DECAY MUONBEAMLINE AT J-PARC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS039 (2011)
C-131
Nemoto, Y. et al
PRESENT STATUS OF CRYOGENIC SYSTEMFOR SUPERCONDUCTING SOLENOID AT
J-PARC MUSE
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS041 (2011)
C-132
Suganuma, K. et al.
CONNECTOR RENOVATION OF KICKERMAGNET AT J-PARC 3 RCS
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS045 (2011)
C-133
Shirakabe, Y. et al.
COMPARISON OF THE LASER TRACKER
SURVEYS FOR THE J-PARC HADRON FACILITYSWITCHYARD BEAMLINE BEFORE/AFTER THE
EARTHQUAKE
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS048 (2011)

C-137
Hayashi, N.
INDIVIDUAL BPM RESOLUTION
MEASUREMENTS UNDER LINEAR LATTICEACCELERATORMODEL
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS060 (2011)
C-138
Tejima, M. et al.
BEAM BASED GAIN CALIBRATION METHOD
FOR BEAM POSITION MONITOR AT J-PARC
MR
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS061 (2011)
C-139
Hashimoto, Y. et al.
CHARACTERISTICS OF A DCCT FOR THE
J-PARC MAIN RING
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS064 (2011)
C-140
Omori, Y. et al.
A CALIBRATION METHOD FOR BEAM DCCT
OF J-PARC MAIN RING
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS065 (2011)
C-141
Toyama, T. et a.
BEAM-BASED CORRECTION OF A DCCTRESPONSE
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS068 (2011)

C-134
Yanaoka, E. et al.
DEVELOPMENT OF DYNAMIC BUMP SYSTEMFOR J-PARC SLOW EXTRACTION
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS052 (2011)

C-142
Hatakeyama, S. et al.
MEASUREMENT OF ROTATION ERROR OF
BPM AROUND BEAM AXIS IN J-PARC RCS
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS070 (2011)

C-135
Watanabe, M. et al.
OPERATION AND CURRENT STATUS OFINJECTION AND EXTRACTION MAGNET AND
THE POWER SUPPLY FOR J-PARC 3 GeV RCS
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS055 (2011)

C-143
Sato, Y. et al.
PROFILE MEASUREMENTS OF PROTON BEAM
WITH RESIDUAL GAS IONIZATION PROFILEMONITORS AT J-PARC HADORON FACILITY
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS074 (2011)

C-136
Satou, K. et al.
UPGRADE SCHEME OF BLM SYSTEM OF
J-PARC MR
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS058 (2011)

C-144
Miura, A. et al.
BEAM LOSS DETECTED BY SCINTILLATIONMONITORProc. of 8th Annual Meeting ofParticle Accelerator Society of Japan (August
1-3, 2011, Tsukuba, Japan), MOPS077 (2011)

Publications

J-PARC Annual Report 2011

88
C-145
Sato, H. et al.
BEAM LOSS PARTICLE TRACKING IN J-PARC
LINAC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS078 (2011)

C-153
Yamanoi, Y. et al.
WATER-COOLED PRODUCTION TARGET AT
J-PARC HADRON FACILITY
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS139 (2011)

C-161
Tamura, F. et al.
MULTI-HARMONIC BEAM LOADINGCOMPENSATION IN THE J-PARC RCS
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TULH02 (2011)

C-146
Akiyama, A. et al.
THE AUTOMATION OF THE MANAGEMENT OF
THE MPS FOR J-PARC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS082 (2011)

C-154
Meigo S. et al.
Influence of the great earthquake disaster on
the beam transport (3NBT) for high intensity
neutron source at J-PARC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS155 (2011)

C-162
Ishii, T.
EFFECT OF THE EARTHQUAKE ON THE J-PARC
NEUTRINO FACILITY
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUMH03 (2011)

C-147
Yoshii, A. et al.
EXAMINATION OF APPLYING HADOOP FOR
J-PARC DRIVING DATA ARCHIVE
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS083 (2011)
C-148
Suzuki, T. et al.
DEVELOPMENT OF J-PARC LINAC/RCS MPSSUBSYSTEM2
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS085 (2011)
C-149
Kamikubota, N. et al.
PLAN TO DEVELOP OVERALL STATUSSCREENS FOR J-PARC ACCELERATORCOMPLEX
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS089 (2011)
C-150
Kobayashi, Y. et al.
CONSTRUCTION OF CONTROL SYSTEM FOR
MUON ROTATING TARGET AT J-PARC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS093 (2011)
C-151
Kawase, M. et al.
PLAN TO DEVELOP OVERALL-CONROLSYSTEM FOR 3GEV SYNCHROTRONACCELERATOR
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS097 (2011)
C-152
Futatsukawa, K. et al.
UPGRADE OF THE RF REFERENCE SYSTEMFOR THE J-PARC 400 MeV LINAC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS111 (2011)

C-155
Takahashi, H. et al.
REMOTE MAINTENANCE OF BEAM
COLLIMATORS AT J-PARC HADRON FACILITY
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS159 (2011)
C-156
Harada, M. et al.
DISPLACEMENT OF BUILDINGS AND
STANDARD POINTS IN MLF CAUSED BY THE
2011 OFF THE PACIFIC COAST OF TOHOKU
EARTHQUAKE
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS161 (2011)
C-157
Iwahashi, T. et al.
Beam Lines Alignment Status of Neutron
Experimental Instruments at J-PARC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS162 (2011)
C-158
Tani, N. et al.
EFFECT OF J-PARC 3GeV RCS ALIGNMENTAFTER THE TOHOKU EARTHQUAKE IN JAPAN
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS164 (2011)
C-159
Morishita, T. et al.
DEFORMATION OF J-PARC LINAC AFTER THETOHOKU EARTHQUAKE IN JAPAN
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), MOPS165 (2011)
C-160
Tomizawa, M. et al.
IMPROVEMENTS OF SLOW-EXTRACTED BEAM
FROM J-PARC MAIN RING
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TULH01 (2011)

C-163
Hashimoto, Y. et al.
Simulations of Beam Wake at Injection/
Extraction Devices of J-PARC Main Ring
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS085 (2011)
C-164
Hara, K. et al.
SIMULATION CALCULATION OFLONGITUDINAL BEAM DISTRIBUTION IN
J-PARC MAIN RING
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS088 (2011)
C-165
Ikegami, M.
EFFECT OF LARGE DTQ ALIGNMENT ERRORFOR J-PARC LINAC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS094 (2011)
C-166
Makimura, S. et al.
REPORT FOR MUON PRODUCTION TARGET
WITH PROTON BEAM OPERATION IN J-PARC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS111 (2011)
C-167
Oguri, H. et al.
OPERATION STATUS OF THE J-PARC NEGATIVEHYDROGEN ION SOURCE
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS115 (2011)
C-168
Yoshii, M. et al.
THE STATUS OF MA LOADED RF SYSTEMS IN
THE J-PARC SYNCHROTRONS
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS120 (2011)

J-PARC Annual Report 2011

Publications

89
C-169
Nomura, M. et al.
IMPEDANCE MEASUREMENTS OF RF CAVITIESIN J-PARC SYNCHROTRONS
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS130 (2011)
C-170
Shimada, T. et al.
RF HEATING TEST OF VACUUM RELAYSEMPLOYED TO SHORT ACCELERATION GAPS
IN J-PARC MAIN RING
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS140 (2011)
C-171
Ao, H. et al.
ACS CAVITY FOR J-PARC LINAC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS142 (2011)
C-172
Ito, T. et al.
Recovery status of J-PARC linac after TohokuPacific Ocean Earthquake
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS144 (2011)
C-173
Hirano, K. et al.
STUDY FOR RF CHOPPER CAVITIES AT J-PARC
LINAC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS149 (2011)
C-174
Kawamura, M. et al.
PRESENT STATUS OF RF SOURCE IN J-PARC
LINAC - Recovery from Earthquake Disasterand Energy Upgrade Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS157 (2011)
C-175
Uota, M. et al.
REMARKABLE PRESSURE RISE AT PUMPING
PORT IN J-PARC MAIN RING
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), TUPS162 (2011)
C-176
Ishii T. et al.
EFFECT OF THE EARTHQUAKE ON THE J-PARC
NEUTRINO FACILITY
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), Vol 2011, (2011)

C-177
Sato, Y. et al.
BEAM DYNAMICS SIMULATIONS OF
J-PARC MAIN RING FOR FAST EXTRACTION
OPERATION: BENCHMARKS AND KEYS FORUPGRADE PLAN BY HIGHER REPETITION"
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2011,
Tsukuba, Japan), WELH07 (2011)
C-178
Sato, A. et al.
THE FIRST MUON BEAM MEASUREMENT AT
THE MuSIC
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2012,
Tsukuba, Japan), Vol 2011, (2011)
C-179
Maki, M. et al.
DEVELOPMENT OF NEW CRYOSTAT FOR
LIQUID-Ar TPC DETECTOR
Proc. of 8th Annual Meeting of Particle
Accelerator Society of Japan (August 1-3, 2013,
Tsukuba, Japan), Vol 2011, (2011)
C-180
Toh, K. et al.
Effects of Gamma-Rays on
Polymethylmethacrylate Plastic Optical Fiber
under Low Dose-Rate Irradiation
Proc. of the 2011 IEEE Nuclesr Scinece Sympo,
M-149 (2011)
C-181
Nakamura, T. et al.
Development of Wavelength-Shifting-Fiber
Neutron Image Detector with a Fiber-Optic
Taper with a High Spatial Resolution
Proc. of the 2011 IEEE Nuclesr Scinece Sympo,
M-179 (2011)
C-182
Sasa, T. et al.
Shielding analysis of the secondary coolant
circuit of accelerator driven systems
Steam Generator Systems; Operational
Reliability and Efficiency
C-183
Ishikawa, H.
Information Security Countermeasures on
J-PARC network infrastructure

平成 22 年度熊本大学総合技術研究会報告集(CD-ROM)

Publications

J-PARC Annual Report 201190

JAEA Reports
J-001
Yamagishi, H. et al.
A Low Noise ASIC for Two Dimensional Neutron Gas Detector with Performance of HighSpatial Resolution (Contract Research)
JAEA-Research 2011-051 (2012)

J-004
Neutron Source Section, Materials and Life
Science Division
Technical design report of spallation neutron
source facility in J-PARC
JAEA-Technology 2011-035 (2012)

J-002
Kajimoto, R. et al.
Proceedings of the Workshops on "JAEA
Project Researches at J-PARC/MLF"; Sep.29,
Oct.28, and Oct.29, 2010, Ibaraki Quantum
Beam Research Center, Tokai, Ibaraki, Japan
JAEA-Review 2011-014 (2011)

J-005
Sakai, K. et al.
Influence of Great East Japan Earthquake onneutron source station in J-PARC
JAEA-Technology 2011-039 (2012)

J-003
Ishikawa, H. et al.
Development of Information Security and Vulnerability Risk Management System for J-PARC
JAEA-Technology 2011-030 (2012)

J-006
Kinoshita, H. et al.
Result of Study on Storage Plan for IrradiatedComponents Generated at MLF in J-PARC
JAEA-Technology 2011-040 (2012)

KEK Reports
K-001
Y. Nemoto
超伝導ソレノイド電磁石用ヘリウム冷凍機の運転および保守管理
KEK Proceedings 2011-2 , Proc. of the Meetingon the Technical Study at KEK KEK, Tsukuba,
Japan,

K-002
Muon Science Laboratory
Presentations for the Muon Science
Advisory(and the 9th Muon Science
Experimental Facility Advisory Committee)
MuSAC
KEK-Proceedings 2011-3

J-007
Koizumi, I. et al.
Repairs crack in concrete floor at 3GeV synchrotron accelerator building
JAEA-Testing 2011-002 (2011)